Commit Graph

5141 Commits

Author SHA1 Message Date
Gavin Shan
149ba66a90 drivers/pci/hotplug: Remove likely() and unlikely() in powernv driver
This removes likely() and unlikely() in pnv_php.c as the code isn't
running in hot path. Those macros to affect CPU's branch stream don't
help a lot for performance. I used them to identify the cases are
likely or unlikely to happen. No logical changes introduced.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-09-29 15:01:55 +10:00
Yongji Xie
62d9a78f32 PCI: Ignore requested alignment for VF BARs
Resource allocation for VFs is done via the VF BARx registers in the PF's
SR-IOV Capability, and the BARs in the VFs themselves are read-only zeros
(see SR-IOV spec r1.1, secs 3.3.14 and 3.4.1.11).

Even though the actual VF BARs are read-only zeros, the VF dev->resource[]
structs describe the space allocated for the VF (this is a piece of the
space described by the VF BARx register in the PF's SR-IOV capability).

It's meaningless to request additional alignment for a VF: the VF BAR
alignment is completely determined by the alignment of the VF BARx in the
PF and the size of the VF BAR.

Ignore the user's alignment requests for VF devices.

Signed-off-by: Yongji Xie <xyjxie@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-09-28 17:17:20 -05:00
Yongji Xie
f0b99f70e9 PCI: Ignore requested alignment for PROBE_ONLY and fixed resources
Users may request additional alignment of PCI resources, e.g., to align
BARs on page boundaries so they can be shared with guests via VFIO.  This
of course may require reallocation if firmware has already assigned the
BARs with smaller alignments.

If the platform has requested PCI_PROBE_ONLY, we should never change any
PCI BARs, so we can't provide any additional alignment.  Also, if a BAR is
marked as IORESOURCE_PCI_FIXED, e.g., for PCI Enhanced Allocation or if the
firmware depends on the current BAR value, we can't change the alignment.

In these cases, log a message and ignore the user's alignment requests.

[bhelgaas: changelog, use goto to simplify PCI_PROBE_ONLY check]
Signed-off-by: Yongji Xie <xyjxie@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-09-28 16:44:52 -05:00
Lukas Wunner
a0d2a959d3 PCI: Avoid unnecessary resume after direct-complete
Commit 58a1fbbb2e ("PM / PCI / ACPI: Kick devices that might have been
reset by firmware") added a runtime resume for devices that were runtime
suspended when the system entered sleep.

The motivation was that devices might be in a reset-power-on state after
waking from system sleep, so their power state as perceived by Linux
(stored in pci_dev->current_state) would no longer reflect reality.  By
resuming such devices, we allow them to return to a low-power state via
autosuspend and also bring their current_state in sync with reality.

However for devices that are *not* in a reset-power-on state, doing an
unconditional resume wastes energy.  A more refined approach is called for
which issues a runtime resume only if the power state after direct-complete
is shallower than it was before. To achieve this, update the device's
current_state and compare it to its pre-sleep value.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-09-28 11:49:21 -05:00
Lukas Wunner
a6a64026c0 PCI: Recognize D3cold in pci_update_current_state()
Whenever a device is resumed or its power state is changed using the
platform, its new power state is read from the PM Control & Status Register
and cached in pci_dev->current_state by calling pci_update_current_state().

If the device is in D3cold, reading from config space typically results in
a fabricated "all ones" response.  But if it's in D3hot, the two bits
representing the power state in the PMCSR are *also* set to 1.  Thus D3hot
and D3cold are not discernible by just reading the PMCSR.

To account for this, pci_update_current_state() uses two workarounds:

- When transitioning to D3cold using pci_platform_power_transition(), the
  new power state is set blindly by pci_update_current_state(), i.e.
  without verifying that the device actually *is* in D3cold.  This is
  achieved by setting the "state" argument to PCI_D3cold.  The "state"
  argument was originally intended to convey the new state in case the
  device doesn't have the PM capability.  It is *also* used to convey the
  device state if the PM capability is present and the new state is D3cold,
  but this was never explained in the kerneldoc.

- Once the current_state is set to D3cold, further invocations of
  pci_update_current_state() will blindly assume that the device is still
  in D3cold and leave the current_state unmodified.  To get out of this
  impasse, the current_state has to be set directly, typically by calling
  pci_raw_set_power_state() or pci_enable_device().

It would be desirable if pci_update_current_state() could reliably detect
D3cold by itself.  That would allow us to do away with these workarounds,
and it would allow for a smarter, more energy conserving runtime resume
strategy after system sleep:  Currently devices which utilize
direct_complete are mandatorily runtime resumed in their ->complete stage.
This can be avoided if their power state after system sleep is the same as
before, but it requires a mechanism to detect the power state reliably.

We've just gained the ability to query the platform firmware for its
opinion on the device's power state.  On platforms conforming to ACPI 4.0
or newer, this allows recognition of D3cold.  Pre-4.0 platforms lack _PR3
and therefore the deepest power state that will ever be reported is D3hot,
even though the device may actually be in D3cold.  To detect D3cold in
those cases, accessibility of the vendor ID in config space is probed using
pci_device_is_present().  This also works for devices which are not
platform-power-manageable at all, but can be suspended to D3cold using a
nonstandard mechanism (e.g. some hybrid graphics laptops or Thunderbolt on
the Mac).

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-09-28 11:47:38 -05:00
Lukas Wunner
cc7cc02bad PCI: Query platform firmware for device power state
Usually the most accurate way to determine a PCI device's power state is to
read its PM Control & Status Register.  There are two cases however when
this is not an option:  If the device doesn't have the PM capability at
all, or if it is in D3cold (in which case its config space is
inaccessible).

In both cases, we can alternatively query the platform firmware for its
opinion on the device's power state.  To facilitate this, augment struct
pci_platform_pm_ops with a ->get_power callback and implement it for
acpi_pci_platform_pm (the only pci_platform_pm_ops existing so far).

It is used by a forthcoming commit to let pci_update_current_state()
recognize D3cold.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-09-28 11:46:51 -05:00
Lukas Wunner
4132a577a0 PCI: Afford direct-complete to devices with non-standard PM
There are devices not power-manageable by the platform, but still able to
runtime suspend to D3cold with a non-standard mechanism.  One example is
laptop hybrid graphics where the discrete GPU and its built-in HDA
controller are power-managed either with a _DSM (AMD PowerXpress, Nvidia
Optimus) or a separate gmux controller (MacBook Pro).  Another example is
Thunderbolt on Macs which is power-managed with custom ACPI methods.

When putting the system to sleep, we currently handle such devices
improperly by transitioning them from D3cold to D3hot (the default power
state defined at the top of pci_target_state()).  This wastes energy and
prolongs the suspend sequence (powering up the Thunderbolt controller takes
2 seconds).

Avoid that by assuming that a non-standard PM mechanism is at work if the
device is not platform-power-manageable but currently in D3cold.

If the device is wakeup enabled, we might still have to wake it up from
D3cold if PME cannot be signaled from that power state.

The check for devices without PM capability comes before the check for
D3cold since such devices could in theory also be powered down by
non-standard means and should then be afforded direct-complete as well.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-09-28 11:45:27 -05:00
Keith Busch
66b8080991 PCI/AER: Cache capability position
Save the position of the error reporting capability so it doesn't need to
be rediscovered during error handling.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Lukas Wunner <lukas@wunner.de>
2016-09-27 16:01:49 -05:00
Jon Derrick
4b202b716e PCI/AER: Avoid memory allocation in interrupt handling path
When handling AER events, we previously allocated a struct aer_err_info,
processed the error, and freed the struct.  But aer_isr_one_error() is
serialized by rpc_mutex, so we never need more than one copy of the struct,
and the struct is only about 70 bytes, so we're not saving much by
allocating it dynamically.

Embed a struct aer_err_info directly in struct aer_rpc, which is allocated
at probe-time by aer_probe().

[bhelgaas: changelog]
Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-09-27 14:30:36 -05:00
Thomas Gleixner
1e1b37273c Merge branch 'x86/urgent' into x86/apic
Bring in the upstream modifications so we can fixup the silent merge
conflict which is introduced by this merge.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-09-26 15:47:03 -04:00
Keith Busch
576243b3f9 PCI: pciehp: Allow exclusive userspace control of indicators
PCIe hotplug supports optional Attention and Power Indicators, which are
used internally by pciehp.  Users can't control the Power Indicator, but
they can control the Attention Indicator by writing to a sysfs "attention"
file.

The Slot Control register has two bits for each indicator, and the PCIe
spec defines the encodings for each as (Reserved/On/Blinking/Off).  For
sysfs "attention" writes, pciehp_set_attention_status() maps into these
encodings, so the only useful write values are 0 (Off), 1 (On), and 2
(Blinking).

However, some platforms use all four bits for platform-specific indicators,
and they need to allow direct user control of them while preventing pciehp
from using them at all.

Add a "hotplug_user_indicators" flag to the pci_dev structure.  When set,
pciehp does not use either the Attention Indicator or the Power Indicator,
and the low four bits (values 0x0 - 0xf) of sysfs "attention" write values
are written directly to the Attention Indicator Control and Power Indicator
Control fields.

[bhelgaas: changelog, rename flag and accessors to s/attention/indicator/]
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-09-22 18:20:11 -05:00
Ingo Molnar
baad92e344 Merge branch 'linus' into x86/platform, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-09-22 11:15:38 +02:00
Thomas Gleixner
464b5847e6 Merge branch 'irq/urgent' into irq/core
Merge urgent fixes so pending patches for 4.9 can be applied.
2016-09-20 23:20:32 +02:00
Tyler Baicar
95c35491f6 PCI/AER: Remove duplicate AER severity translation
Currently the AER severity is being translated twice in the code flow for
PCIe errors.  It is first translated in ghes_do_proc() before calling into
the AER driver.  Then it is translated again when the AER driver calls
cper_print_aer().  This causes the severity that is used in
cper_print_aer() to be incorrect.

Remove the second translation that is in cper_print_aer() since this
function is already receiving the correct AER severity.

Signed-off-by: Tyler Baicar <tbaicar@codeaurora.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
2016-09-20 14:35:59 -05:00
Mika Westerberg
afd29f9017 PCI: Add pci_find_resource()
Add a new helper function pci_find_resource() that can be used to find out
whether a given resource (for example from a child device) is contained
within given PCI device's standard resources.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-09-17 01:16:03 +02:00
Thomas Gleixner
0a30d69195 Merge branch 'irq/for-block' into irq/core
Add the new irq spreading infrastructure.
2016-09-15 20:54:40 +02:00
Niklas Cassel
b58ddf1747 PCI: artpec6: Drop __init from artpec6_add_pcie_port()
artpec6_add_pcie_port() is called from artpec6_pcie_probe(), which is not
marked __init.  It is wrong to call an __init function from a non-__init
one, so remove __init from artpec6_add_pcie_port().

[bhelgaas: changelog]
Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-09-14 16:20:47 -05:00
Sergei Shtylyov
f7bc63802d PCI: rcar: Fix some checkpatch warnings
The R-Car PCIe driver causes 13 warnings from scripts/checkpatch.pl --
let's fix at least 10 easier ones:

  - line over 80 characters;
  - blank line missing after declarations;
  - statements not starting on a tabstop.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
2016-09-14 16:16:34 -05:00
Grigory Kletsko
e3123c20c8 PCI: rcar: Add multi-MSI support
Implement the MSI .setup_irqs() method which enables allocation of several
MSIs at once.

[Sergei Shtylyov: removed unrelated/unneeded changes, fixed too long lines,
reordered the variable declarations, reworded the summary/description.]
Signed-off-by: Grigory Kletsko <grigory.kletsko@cogentembedded.com>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
2016-09-14 16:13:58 -05:00
Linus Torvalds
4cea877657 PCI updates for v4.8:
Enumeration
     Mark Haswell Power Control Unit as having non-compliant BARs (Bjorn Helgaas)
 
   Power management
     Fix bridge_d3 update on device removal (Lukas Wunner)
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Merge tag 'pci-v4.8-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:
 "Here are two changes for v4.8.  The first fixes a "[Firmware Bug]: reg
  0x10: invalid BAR (can't size)" warning on Haswell, and the second
  fixes a problem in some new runtime suspend functionality we merged
  for v4.8.  Summary:

  Enumeration:
    Mark Haswell Power Control Unit as having non-compliant BARs (Bjorn Helgaas)

  Power management:
    Fix bridge_d3 update on device removal (Lukas Wunner)"

* tag 'pci-v4.8-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI: Fix bridge_d3 update on device removal
  PCI: Mark Haswell Power Control Unit as having non-compliant BARs
2016-09-14 14:06:30 -07:00
Bjorn Helgaas
7ece141753 PCI/AER: Remove aerdriver.forceload kernel parameter
Per the PCI Firmware spec, r3.0, sec 4.5.1, on ACPI systems, the OS must
not use AER unless _OSC is present and _OSC grants AER control to the OS.
The aerdriver.forceload kernel parameter was a way to enable Linux AER
support on ACPI systems that lack _OSC or fail to grant control the the OS.

Enabling Linux AER support when the firmware doesn't want us to is a recipe
for problems, e.g., the firmware might be handling AER itself.

Remove the aerdriver.forceload kernel parameter and related supporting
code.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-09-14 15:27:49 -05:00
Bjorn Helgaas
9ff25e6b3e PCI/AER: Remove aerdriver.nosourceid kernel parameter
The aerdriver.nosourceid kernel parameter was intended for working around
broken chipsets don't supply the source ID for AER events.  We recently
added PCI_BUS_FLAGS_NO_AERSID, which can be set by quirks for the same
purpose.

Remove the aerdriver.nosourceid kernel parameter.  For anything other than
debugging, asking users to find and use kernel parameters is a poor user
experience.  Instead, we should add PCI_BUS_FLAGS_NO_AERSID quirks for any
hardware that needs it.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-09-14 15:27:38 -05:00
Thomas Gleixner
ee8d41e53e pci/msi: Retrieve affinity for a vector
Add a helper to get the affinity mask for a given PCI irq vector.  For MSI or
MSI-X vectors these are stored by the IRQ core, while for legacy interrupts
we will always return cpu_possible_map.

[hch: updated to follow the style of pci_irq_vector()]

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: axboe@fb.com
Cc: keith.busch@intel.com
Cc: agordeev@redhat.com
Cc: linux-block@vger.kernel.org
Link: http://lkml.kernel.org/r/1473862739-15032-6-git-send-email-hch@lst.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-09-14 22:11:10 +02:00
Thomas Gleixner
e75eafb9b0 genirq/msi: Switch to new irq spreading infrastructure
Switch MSI over to the new spreading code. If a pci device contains a valid
pointer to a cpumask, then this mask is used for spreading otherwise the
online cpu mask is used. This allows a driver to restrict the spread to a
subset of CPUs, e.g. cpus on a particular node.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: axboe@fb.com
Cc: keith.busch@intel.com
Cc: agordeev@redhat.com
Cc: linux-block@vger.kernel.org
Link: http://lkml.kernel.org/r/1473862739-15032-4-git-send-email-hch@lst.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-09-14 22:11:09 +02:00
Thomas Gleixner
28f4b04143 genirq/msi: Add cpumask allocation to alloc_msi_entry
For irq spreading want to store affinity masks in the msi_entry. Add the
infrastructure for it.

We allocate an array of cpumasks with an array size of the number of used
vectors in the entry, so we can hand in the information per linux interrupt
later.

As we hand in the number of used vectors, we assign them right
away. Convert all the call sites.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: axboe@fb.com
Cc: keith.busch@intel.com
Cc: agordeev@redhat.com
Cc: linux-block@vger.kernel.org
Cc: Christoph Hellwig <hch@lst.de>
Link: http://lkml.kernel.org/r/1473862739-15032-2-git-send-email-hch@lst.de
2016-09-14 22:11:08 +02:00
Bjorn Helgaas
29a654e59f PCI: pciehp: Remove useless pciehp_get_latch_status() calls
Long ago, we updated a "switch_save" field based on the latch status.  But
switch_save was unused, and ed6cbcf2ac ("[PATCH] pciehp: miscellaneous
cleanups") removed it.

We no longer use the latch status, so remove calls to
pciehp_get_latch_status().  No functional change intended.

Tested-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2016-09-14 14:25:05 -05:00
Bjorn Helgaas
6e49b304e3 PCI: pciehp: Clean up dmesg "Slot(%s)" messages
Print slot name consistently as "Slot(%s)".  I don't know whether that's
ideal, but we can at least do it the same way all the time.  No functional
change intended.

Tested-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2016-09-14 14:25:00 -05:00
Bjorn Helgaas
4947793916 PCI: pciehp: Remove unnecessary guard
In pcie_isr(), we return early if no status bits other than
PCI_EXP_SLTSTA_CC are set.  This was introduced by dbd79aed1a ("pciehp:
fix NULL dereference in interrupt handler"), but it is no longer necessary
because all the subsequent pcie_isr() code is already predicated on a
status bit being set.

Remove the unnecessary test for ~PCI_EXP_SLTSTA_CC.  No functional change
intended.

Tested-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2016-09-14 14:24:54 -05:00
Mayurkumar Patel
69bd3c5b28 PCI: pciehp: Don't re-read Slot Status when handling surprise event
Previously we read Slot Status when handling a surprise event.  But Slot
Status might have changed since we identified the event, and the event_type
already tells us whether to enable or disable the slot, so there's no need
to read it again.

Remove handle_surprise_event() and queue the power work directly.

[bhelgaas: changelog]
Tested-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Mayurkumar Patel <mayurkumar.patel@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Rajat Jain <rajatxjain@gmail.com>
2016-09-14 14:24:45 -05:00
Mayurkumar Patel
0c923d1da3 PCI: pciehp: Don't re-read Slot Status when queuing hotplug event
Previously we read Slot Status to learn about hotplug events, then cleared
the events, then re-read Slot Status to find out what happened.  But Slot
Status might have changed before the second read.

Capture the Slot Status once before clearing the events.  Also capture the
Link Status if we had a link status change.

[bhelgaas: changelog, split to separate patch]
Tested-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Mayurkumar Patel <mayurkumar.patel@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2016-09-14 14:24:40 -05:00
Mayurkumar Patel
fad214b0aa PCI: pciehp: Process all hotplug events before looking for new ones
Previously we accumulated hotplug events, then processed them, essentially
like this:

  events = 0
  do {
    status = read(Slot Status)
    status &= EVENT_MASK              # only look at events
    events |= status                  # accumulate events
    write(Slot Status, events)        # clear events
  } while (status)
  process events

The problem is that as soon as we clear events in Slot Status, the hardware
may send notifications for new events, and we lose information about the
first events.  For example, we might see two Presence Detect Changed
events, but lose the fact that the slot was temporarily empty:

  read  PCI_EXP_SLTSTA_PDC set, PCI_EXP_SLTSTA_PDS clear  # slot empty
  write PCI_EXP_SLTSTA_PDC                                # clear PDC event
  read  PCI_EXP_SLTSTA_PDC set, PCI_EXP_SLTSTA_PDS set    # slot occupied

The current code does not process a removal; it only processes the
insertion, which fails because we didn't remove the original device.

To avoid this problem, read Slot Status once and process all the events
before reading it again, like this:

  do {
    read events
    clear events
    process events
  } while (events)

[bhelgaas: changelog, add external loop around pciehp_isr()]
Tested-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Mayurkumar Patel <mayurkumar.patel@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2016-09-14 14:24:31 -05:00
Bjorn Helgaas
70e8b40176 PCI: pciehp: Return IRQ_NONE when we can't read interrupt status
After 1469d17dd3 ("PCI: pciehp: Handle invalid data when reading from
non-existent devices"), we returned IRQ_HANDLED when we failed to read
interrupt status from the bridge.  I think it's better to return IRQ_NONE,
as we do in other cases where there's no interrupt pending.  This will
facilitate refactoring the loop in pcie_isr(): we'll be able to call the
ISR in a loop as long as it returns IRQ_HANDLED.

Return IRQ_NONE if we couldn't read interrupt status.

Tested-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2016-09-14 14:24:25 -05:00
Lukas Wunner
035ee288ae PCI: Fix bridge_d3 update on device removal
Starting with v4.8, we allow a PCIe port to runtime suspend to D3hot if the
port itself and its children satisfy a number of conditions.  Once a child
is removed, we recheck those conditions in case the removed device was
blocking the port from suspending.

The rechecking needs to happen *after* the device has been removed from the
bus it resides on.  Otherwise when walking the port's subordinate bus in
pci_bridge_d3_update(), the device being removed would erroneously still be
taken into account.

However the device is removed from the bus_list in pci_destroy_dev() and we
currently recheck *before* that.  Fix it.

Fixes: 9d26d3a8f1 ("PCI: Put PCIe ports into D3 during suspend")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Rafael J. Wysocki <mika.westerberg@linux.intel.com>
2016-09-13 16:00:18 -05:00
Bharat Kumar Gogada
b328f3ce99 PCI: xilinx: Dispose of MSI virtual IRQ
Dispose of virtual IRQ being created for MSI interrupts.

Signed-off-by: Bharat Kumar Gogada <bharatku@xilinx.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
2016-09-13 10:40:02 -05:00
Bharat Kumar Gogada
8a4036edf9 PCI: xilinx: Clear correct MSI set bit
Kernel provides virtual IRQ number at teardown.  Get hwirq number from
virtual IRQ and clear correct MSI set bit.

Signed-off-by: Bharat Kumar Gogada <bharatku@xilinx.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
2016-09-13 10:39:21 -05:00
Bharat Kumar Gogada
3cd049ab9e PCI: xilinx: Clear interrupt register for invalid interrupt
The interrupt decode register is not being cleared if an invalid interrupt
arises.  Clear the decode register in this case.

Signed-off-by: Bharat Kumar Gogada <bharatku@xilinx.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
2016-09-13 10:38:19 -05:00
Bharat Kumar Gogada
b584fa1fde PCI: xilinx: Keep both legacy and MSI interrupt domain references
When built with MSI support, the legacy domain reference was being
overwritten with MSI.

Create two separate domains for MSI and legacy interrupts.

Signed-off-by: Bharat Kumar Gogada <bharatku@xilinx.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
2016-09-13 10:21:36 -05:00
Bharat Kumar Gogada
f665bd1515 PCI: xilinx-nwl: Enable all MSI interrupts using MSI mask
The current mask enables and allows only one MSI interrupt on each MSI
line.  Enable all MSI interrupts, which will also support Endpoints with
multi-MSI support.

Signed-off-by: Bharat Kumar Gogada <bharatku@xilinx.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-09-13 10:15:41 -05:00
Bharat Kumar Gogada
c2a7ff18ed PCI: xilinx-nwl: Expand error logging
The current driver logs PCIe core errors.  Add logging for individual core
events.

[bhelgaas: changelog]
Signed-off-by: Bharat Kumar Gogada <bharatku@xilinx.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-09-13 09:17:08 -05:00
Geert Uytterhoeven
3d664b070c PCI: rcar: Don't disable/unprepare clocks on prepare/enable failure
If clk_prepare_enable() fails, we must not call clk_disable_unprepare() in
the error path.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-09-12 17:15:09 -05:00
Bjorn Helgaas
6c8b12080e PCI: altera: Remove redundant platform_get_resource() return value check
devm_ioremap_resource() fails gracefully when given a NULL resource
pointer, so we don't need to check separately for failure from
platform_get_resource_byname().  Remove the redundant check.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-09-12 16:54:17 -05:00
Ley Foon Tan
ce4f1c7ad4 PCI: altera: Move retrain from fixup to altera_pcie_host_init()
Previously we used a PCI early fixup to initiate a link retrain on Altera
devices.  But Altera PCIe IP can be configured as either a Root Port or an
Endpoint, and they might have same vendor ID, so the fixup would be run for
both.

We only want to initiate a link retrain for Altera Root Port devices, not
for Endpoints, so move the link retrain functionality from the fixup to
altera_pcie_host_init().

[bhelgaas: changelog]
Signed-off-by: Ley Foon Tan <lftan@altera.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-09-12 16:49:13 -05:00
Po Liu
8e7ca8ca5f PCI: xilinx: Relax device number checking to allow SR-IOV
Previously we only allowed device 0 to be directly attached to the root
port.  But SR-IOV devices may use non-zero device numbers for VFs.

Remove the restriction that only device 0 may be attached to a root port.

[bhelgaas: changelog]
Signed-off-by: Po Liu <po.liu@nxp.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-09-12 16:40:34 -05:00
Po Liu
e18934b5e9 PCI: designware: Relax device number checking to allow SR-IOV
Previously we only allowed device 0 to be directly attached to the root
port.  But SR-IOV devices may use non-zero device numbers for VFs.

Remove the restriction that only device 0 may be attached to a root port.

[bhelgaas: changelog]
Signed-off-by: Po Liu <po.liu@nxp.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Jingoo Han <jingoohan1@gmail.com>
2016-09-12 16:39:20 -05:00
Po Liu
d99e30b793 PCI: altera: Relax device number checking to allow SR-IOV
Previously we only allowed device 0 to be directly attached to the root
port.  But SR-IOV devices may use non-zero device numbers for VFs.

Remove the restriction that only device 0 may be attached to a root port.

[bhelgaas: changelog]
Signed-off-by: Po Liu <po.liu@nxp.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Ley Foon Tan <lftan@altera.com>
2016-09-12 16:32:36 -05:00
Po Liu
156c55325d PCI: Check for pci_setup_device() failure in pci_iov_add_virtfn()
If pci_setup_device() returns failure, we must return failure from
pci_iov_add_virtfn().  If we ignore the failure and continue with an
uninitialized pci_dev for virtfn, we crash later when we try to use those
uninitialized parts.

Signed-off-by: Po Liu <po.liu@nxp.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-09-12 16:23:38 -05:00
Tomasz Nowicki
be2021baee PCI/MSI: Setup MSI domain on a per-device basis using IORT ACPI table
It is possible to provide information about which MSI controller to
use on a per-device basis for DT. This patch supply this with ACPI support.

Currently, IORT is the only one ACPI table which can provide such mapping.
In order to plug IORT into MSI infrastructure we are adding ACPI
equivalents for finding PCI device domain and its RID translation
(pci_msi_domain_get_msi_rid and pci_msi_domain_get_msi_rid calls).

Signed-off-by: Tomasz Nowicki <tn@semihalf.com>
Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2016-09-12 20:32:41 +01:00
Bjorn Helgaas
a8499f20d3 PCI: pciehp: Rename pcie_isr() locals for clarity
Rename "detected" and "intr_loc" to "status" and "events" for clarity.
"status" is the value we read from the Slot Status register; "events" is
the set of hot-plug events we need to process.  No functional change
intended.

Tested-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2016-09-12 12:26:07 -05:00
Rui Wang
d9c149d6ce x86/ioapic: Ignore root bridges without a companion ACPI device
Some PCI root bridges don't have a corresponding ACPI device.
This can be the case on some old platforms. Don't call acpi_ioapic_add()
on these bridges because they can't support ioapic hotplug.

Reported-and-tested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Rui Wang <rui.y.wang@intel.com>
Reviewed-by: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: bhelgaas@google.com
Cc: helgaas@kernel.org
Cc: linux-acpi@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Cc: rjw@rjwysocki.net
Cc: tony.luck@intel.com
Link: http://lkml.kernel.org/r/1473522046-31329-1-git-send-email-rui.y.wang@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-09-10 20:30:31 +02:00
Andy Shevchenko
8e522e1d32 x86/platform/intel-mid: Add Intel Penwell to ID table
Commit:

  ca22312dc8 ("x86/platform/intel-mid: Extend PWRMU to support Penwell")

... enabled the PWRMU driver on platforms based on Intel Penwell, but
unfortunately this is not enough.

Add Intel Penwell ID to pci-mid.c driver as well. To avoid confusion in the
future add a comment to both drivers.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: ca22312dc8 ("x86/platform/intel-mid: Extend PWRMU to support Penwell")
Link: http://lkml.kernel.org/r/20160908103232.137587-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-09-08 14:07:53 +02:00
Andy Shevchenko
f5fbf84830 x86/cpu: Rename Merrifield2 to Moorefield
Merrifield2 is actually Moorefield.

Rename it accordingly and drop tail digit from Merrifield1.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160906184254.94440-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-09-08 08:13:08 +02:00
Herbert Xu
0bec90571c PCI: Fix cavium quirk compile failure with PCI_ATS off
The newly added quirk_cavium_sriov_rnm_link doesn't compile if
PCI_ATS is off.  This patch adds a check for PCI_ATS.

Fixes: 21b5b8eebb ("PCI: quirk fixup for cavium invalid sriov...")
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-09-07 21:10:18 +08:00
Jon Derrick
443b40ba21 x86/PCI: VMD: Add quirk for AER to ignore source ID
VMD root ports change all source ids to the VMD device ID.  To find the
sender of the AER notification, we need to scan all child devices for the
AER sender, rather than relying on the source ID from the message.

Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-09-06 14:18:21 -05:00
Jon Derrick
032c3d86b4 PCI/AER: Add bus flag to skip source ID matching
Allow root port buses to choose to skip source id matching when finding the
faulting device.  Certain root port devices may return an incorrect source
ID and recommend to scan child device registers for AER notifications.

Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-09-06 14:15:11 -05:00
Lorenzo Pieralisi
13f392ebc3 PCI: tegra: Fix pci_remap_iospace() failure path
On ARM/ARM64 architectures, PCI IO ports are emulated through memory mapped
IO, by reserving a chunk of virtual address space starting at PCI_IOBASE
and by mapping the PCI host bridges memory address space driving PCI IO
cycles to it.

PCI host bridge drivers that enable downstream PCI IO cycles map the host
bridge memory address responding to PCI IO cycles to the fixed virtual
address space through the pci_remap_iospace() API.

This means that if the pci_remap_iospace() function fails, the
corresponding host bridge PCI IO resource must be considered invalid, in
that there is no way for the kernel to actually drive PCI IO transactions
if the memory addresses responding to PCI IO cycles cannot be mapped into
the CPU virtual address space.

The PCI tegra host bridge driver adds the PCI IO resource retrieved from
firmware to the host bridge resource windows even if the
pci_remap_iospace() call fails; this is an actual bug in that the PCI host
bridge would consider the PCI IO resource valid (and possibly assign it to
downstream devices) even if the kernel was not able to map the PCI host
bridge memory address driving IO cycle to the CPU virtual address space (ie
pci_remap_iospace() failures).

Add the PCI host bridge driver pci_remap_iospace() failure path and do not
add the corresponding PCI host bridge PCI IO resources retrieved through
firmware when the pci_remap_iospace() function call fails, fixing the
issue.

Fixes: e6e9f471f5 ("PCI: tegra: Use generic pci_remap_iospace() rather than ARM32-specific one")
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Thierry Reding <treding@nvidia.com>
2016-09-06 12:42:53 -05:00
Lorenzo Pieralisi
43281ede01 PCI: generic: Fix pci_remap_iospace() failure path
On ARM/ARM64 architectures, PCI IO ports are emulated through memory mapped
IO, by reserving a chunk of virtual address space starting at PCI_IOBASE
and by mapping the PCI host bridges memory address space driving PCI IO
cycles to it.

PCI host bridge drivers that enable downstream PCI IO cycles map the host
bridge memory address responding to PCI IO cycles to the fixed virtual
address space through the pci_remap_iospace() API.

This means that if the pci_remap_iospace() function fails, the
corresponding host bridge PCI IO resource must be considered invalid, in
that there is no way for the kernel to actually drive PCI IO transactions
if the memory addresses responding to PCI IO cycles cannot be mapped into
the CPU virtual address space.

The PCI common host bridge driver does not remove the PCI IO resource from
the host bridge resource windows if the pci_remap_iospace() call fails;
this is an actual bug in that the PCI host bridge would consider the PCI IO
resource valid (and possibly assign it to downstream devices) even if the
kernel was not able to map the PCI host bridge memory address driving IO
cycle to the CPU virtual address space (ie pci_remap_iospace() failures).

Fix the PCI host bridge driver pci_remap_iospace() failure path, by
destroying the PCI host bridge PCI IO resources retrieved through firmware
when the pci_remap_iospace() function call fails, therefore preventing the
kernel from adding the respective PCI IO resource to the list of PCI host
bridge valid resources, fixing the issue.

Fixes: 4e64dbe226 ("PCI: generic: Expose pci_host_common_probe() for use by other drivers")
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Will Deacon <will.deacon@arm.com>
2016-09-06 12:42:13 -05:00
Lorenzo Pieralisi
5e8c873270 PCI: rcar: Fix pci_remap_iospace() failure path
On ARM/ARM64 architectures, PCI IO ports are emulated through memory mapped
IO, by reserving a chunk of virtual address space starting at PCI_IOBASE
and by mapping the PCI host bridges memory address space driving PCI IO
cycles to it.

PCI host bridge drivers that enable downstream PCI IO cycles map the host
bridge memory address responding to PCI IO cycles to the fixed virtual
address space through the pci_remap_iospace() API.

This means that if the pci_remap_iospace() function fails, the
corresponding host bridge PCI IO resource must be considered invalid, in
that there is no way for the kernel to actually drive PCI IO transactions
if the memory addresses responding to PCI IO cycles cannot be mapped into
the CPU virtual address space.

The PCI rcar host bridge driver does not remove the PCI IO resource from
the host bridge resource windows if the pci_remap_iospace() call fails;
this is an actual bug in that the PCI host bridge would consider the PCI IO
resource valid (and possibly assign it to downstream devices) even if the
kernel was not able to map the PCI host bridge memory address driving IO
cycle to the CPU virtual address space (ie pci_remap_iospace() failures).

Fix the PCI host bridge driver pci_remap_iospace() failure path, by
destroying the PCI host bridge PCI IO resources retrieved through firmware
when the pci_remap_iospace() function call fails, therefore preventing the
kernel from adding the respective PCI IO resource to the list of PCI host
bridge valid resources, fixing the issue.

Fixes: 5d2917d469 ("PCI: rcar: Convert to DT resource parsing API")
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Phil Edworthy <phil.edworthy@renesas.com>
CC: Simon Horman <horms+renesas@verge.net.au>
2016-09-06 12:41:50 -05:00
Lorenzo Pieralisi
53f4f7ee28 PCI: versatile: Fix pci_remap_iospace() failure path
On ARM/ARM64 architectures, PCI IO ports are emulated through memory mapped
IO, by reserving a chunk of virtual address space starting at PCI_IOBASE
and by mapping the PCI host bridges memory address space driving PCI IO
cycles to it.

PCI host bridge drivers that enable downstream PCI IO cycles map the host
bridge memory address responding to PCI IO cycles to the fixed virtual
address space through the pci_remap_iospace() API.

This means that if the pci_remap_iospace() function fails, the
corresponding host bridge PCI IO resource must be considered invalid, in
that there is no way for the kernel to actually drive PCI IO transactions
if the memory addresses responding to PCI IO cycles cannot be mapped into
the CPU virtual address space.

The PCI versatile host bridge driver does not remove the PCI IO resource
from the host bridge resource windows if the pci_remap_iospace() call
fails; this is an actual bug in that the PCI host bridge would consider the
PCI IO resource valid (and possibly assign it to downstream devices) even
if the kernel was not able to map the PCI host bridge memory address
driving IO cycle to the CPU virtual address space (ie pci_remap_iospace()
failures).

Fix the PCI host bridge driver pci_remap_iospace() failure path, by
destroying the PCI host bridge PCI IO resources retrieved through firmware
when the pci_remap_iospace() function call fails, therefore preventing the
kernel from adding the respective PCI IO resource to the list of PCI host
bridge valid resources, fixing the issue.

Fixes: b7e78170ef ("PCI: versatile: Add DT-based ARM Versatile PB PCIe host driver")
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Rob Herring <robh@kernel.org>
2016-09-06 12:41:15 -05:00
Lorenzo Pieralisi
bcd7b7186f PCI: designware: Fix pci_remap_iospace() failure path
On ARM/ARM64 architectures, PCI IO ports are emulated through memory mapped
IO, by reserving a chunk of virtual address space starting at PCI_IOBASE
and by mapping the PCI host bridges memory address space driving PCI IO
cycles to it.

PCI host bridge drivers that enable downstream PCI IO cycles map the host
bridge memory address responding to PCI IO cycles to the fixed virtual
address space through the pci_remap_iospace() API.

This means that if the pci_remap_iospace() function fails, the
corresponding host bridge PCI IO resource must be considered invalid, in
that there is no way for the kernel to actually drive PCI IO transactions
if the memory addresses responding to PCI IO cycles cannot be mapped into
the CPU virtual address space.

The PCI designware host bridge driver does not remove the PCI IO resource
from the host bridge resource windows if the pci_remap_iospace() call
fails; this is an actual bug in that the PCI host bridge would consider the
PCI IO resource valid (and possibly assign it to downstream devices) even
if the kernel was not able to map the PCI host bridge memory address
driving IO cycle to the CPU virtual address space (ie pci_remap_iospace()
failures).

Fix the PCI host bridge driver pci_remap_iospace() failure path, by
destroying the PCI host bridge PCI IO resources retrieved through firmware
when the pci_remap_iospace() function call fails, therefore preventing the
kernel from adding the respective PCI IO resource to the list of PCI host
bridge valid resources, fixing the issue.

Fixes: cbce790059 ("PCI: designware: Make driver arch-agnostic")
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Jingoo Han <jingoohan1@gmail.com>
CC: Pratyush Anand <pratyush.anand@gmail.com>
2016-09-06 12:39:38 -05:00
Lorenzo Pieralisi
db047f8a93 PCI: aardvark: Fix pci_remap_iospace() failure path
On ARM/ARM64 architectures, PCI IO ports are emulated through memory mapped
IO, by reserving a chunk of virtual address space starting at PCI_IOBASE
and by mapping the PCI host bridge's memory address space driving PCI IO
cycles to it.

PCI host bridge drivers that enable downstream PCI IO cycles map the host
bridge memory address responding to PCI IO cycles to the fixed virtual
address space through the pci_remap_iospace() API.

This means that if the pci_remap_iospace() function fails, the
corresponding host bridge PCI IO resource must be considered invalid, in
that there is no way for the kernel to actually drive PCI IO transactions
if the memory addresses responding to PCI IO cycles cannot be mapped into
the CPU virtual address space.

The PCI aardvark host bridge driver does not remove the PCI IO resource
from the host bridge resource windows if the pci_remap_iospace() call
fails; this is an actual bug in that the PCI host bridge would consider the
PCI IO resource valid (and possibly assign it to downstream devices) even
if the kernel was not able to map the PCI host bridge memory address
driving IO cycle to the CPU virtual address space (ie pci_remap_iospace()
failures).

Fix the PCI host bridge driver pci_remap_iospace() failure path, by
destroying the PCI host bridge PCI IO resources retrieved through firmware
when the pci_remap_iospace() function call fails, therefore preventing the
kernel from adding the respective PCI IO resource to the list of PCI host
bridge valid resources, fixing the issue.

Fixes: 8c39d71036 ("PCI: aardvark: Add Aardvark PCI host controller driver")
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2016-09-06 12:37:55 -05:00
Dexuan Cui
a5b45b7b95 PCI: hv: Handle hv_pci_generic_compl() error case
'completion_status' is used in some places, e.g.,
hv_pci_protocol_negotiation(), so we should make sure it's initialized in
error case too, though the error is unlikely here.

[bhelgaas: fix changelog typo and nearby whitespace]
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: KY Srinivasan <kys@microsoft.com>
CC: Jake Oshins <jakeo@microsoft.com>
CC: Haiyang Zhang <haiyangz@microsoft.com>
CC: Vitaly Kuznetsov <vkuznets@redhat.com>
2016-09-06 12:23:30 -05:00
Dexuan Cui
665e2245eb PCI: hv: Handle vmbus_sendpacket() failure in hv_compose_msi_msg()
Handle vmbus_sendpacket() failure in hv_compose_msi_msg().

I happened to find this when reading the code.  I didn't get a real issue
however.

Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: KY Srinivasan <kys@microsoft.com>
CC: Jake Oshins <jakeo@microsoft.com>
CC: Haiyang Zhang <haiyangz@microsoft.com>
CC: Vitaly Kuznetsov <vkuznets@redhat.com>
2016-09-06 12:21:57 -05:00
Dexuan Cui
617ceb62ea PCI: hv: Remove the unused 'wrk' in struct hv_pcibus_device
Remove the unused 'wrk' member in struct hv_pcibus_device.

Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: KY Srinivasan <kys@microsoft.com>
CC: Jake Oshins <jakeo@microsoft.com>
CC: Haiyang Zhang <haiyangz@microsoft.com>
CC: Vitaly Kuznetsov <vkuznets@redhat.com>
2016-09-06 12:21:23 -05:00
Dexuan Cui
7d0f8eec97 PCI: hv: Use pci_function_description[0] in struct definitions
The 2 structs can use a zero-length array here, because dynamic memory of
the correct size is allocated in hv_pci_devices_present() and we don't need
this extra element.

No functional change.

Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: KY Srinivasan <kys@microsoft.com>
CC: Jake Oshins <jakeo@microsoft.com>
CC: Haiyang Zhang <haiyangz@microsoft.com>
CC: Vitaly Kuznetsov <vkuznets@redhat.com>
2016-09-06 12:20:44 -05:00
Dexuan Cui
0c6045d8c0 PCI: hv: Use zero-length array in struct pci_packet
Use zero-length array in struct pci_packet and rename struct pci_message's
field "message_type" to "type".  This makes the code more readable.

No functionality change.

Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: KY Srinivasan <kys@microsoft.com>
CC: Jake Oshins <jakeo@microsoft.com>
CC: Haiyang Zhang <haiyangz@microsoft.com>
CC: Vitaly Kuznetsov <vkuznets@redhat.com>
2016-09-06 12:15:46 -05:00
Joao Pinto
f8430eae9f PCI/MSI: Enable PCI_MSI_IRQ_DOMAIN support for ARC
Add ARC as an arch that supports PCI_MSI_IRQ_DOMAIN and add generation of
msi.h in the ARC arch.

Signed-off-by: Joao Pinto <jpinto@synopsys.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
2016-09-06 10:53:32 -05:00
Linus Torvalds
593ee4edc5 Char/Misc driver fixes for 4.8-rc5
Here are a number of small driver fixes for 4.8-rc5.
 
 The largest thing here is deleting an obsolete driver,
 drivers/misc/bh1780gli.c, as the functionality of it was replaced by an
 iio driver a while ago.  The other fixes are things that have been
 reported, or reverts of broken stuff (the binder change).  All of these
 changes have been in linux-next for a while with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver fixes from Greg KH:
 "Here are a number of small driver fixes for 4.8-rc5.

  The largest thing here is deleting an obsolete driver,
  drivers/misc/bh1780gli.c, as the functionality of it was replaced by
  an iio driver a while ago.

  The other fixes are things that have been reported, or reverts of
  broken stuff (the binder change).  All of these changes have been in
  linux-next for a while with no reported issues"

* tag 'char-misc-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  thunderbolt: Don't declare Falcon Ridge unsupported
  thunderbolt: Add support for INTEL_FALCON_RIDGE_2C controller.
  thunderbolt: Fix resume quirk for Falcon Ridge 4C.
  lkdtm: Mark lkdtm_rodata_do_nothing() notrace
  mei: me: disable driver on SPT SPS firmware
  Revert "android: binder: fix dangling pointer comparison"
  drivers/iio/light/Kconfig: SENSORS_BH1780 cleanup
  android: binder: fix dangling pointer comparison
  misc: delete bh1780 driver
2016-09-03 11:38:43 -07:00
Shawn Lin
e77f847df5 PCI: rockchip: Add Rockchip PCIe controller support
Add support for the Rockchip PCIe controller found on RK3399 SoC platform.

[bhelgaas: fold in Brian's rockchip_pcie_client_irq_handler() OR fix, other
fixes and cleanups from Guenter Roeck <linux@roeck-us.net> and me,
uninitialized variable fix from Arnd Bergmann <arnd@arndb.de>]
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Brian Norris <briannorris@chromium.org>
2016-09-03 11:41:09 -05:00
Bjorn Helgaas
9e18ad98ca Merge branch 'pci/ptm' into next
* pci/ptm:
  PCI: Add PTM clock granularity information
  PCI: Add pci_enable_ptm() for drivers to enable PTM on endpoints
  PCI: Add Precision Time Measurement (PTM) support
2016-09-01 09:04:55 -05:00
Ananth Jasty
21b5b8eebb PCI: quirk fixup for cavium invalid sriov link value.
Cavium cn88xx hardware presents an incorrect SR-IOV Function
Dependency Link, add a fixup quirk for the affected devices.

Acked-by: David Daney <david.daney@cavium.com>
Signed-off-by: Ananth Jasty <Ananth.Jasty@cavium.com>
Signed-off-by: Omer Khaliq <okhaliq@caviumnetworks.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-08-31 23:00:38 +08:00
Xavier Gnata
82a6a81c2a thunderbolt: Add support for INTEL_FALCON_RIDGE_2C controller.
From: Xavier Gnata <xavier.gnata@gmail.com>

Add support to INTEL_FALCON_RIDGE_2C controller and corresponding quirk
to support suspend/resume.
Tested against 4.7 master on a MacBook Air 11" 2015.

Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
Reviewed-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-31 13:25:02 +02:00
Andreas Noever
25eb7e5c74 thunderbolt: Fix resume quirk for Falcon Ridge 4C.
The quirk 'quirk_apple_wait_for_thunderbolt' did not fire on Falcon
Ridge 4C controllers with subdevice/subvendor set to zero. This lead
to lost pci devices on system resume.

Older thunderbolt controllers (pre Falcon Ridge) used the same device id
for bridges and for the controller. On Apple hardware the subvendor- &
subdevice-ids were set for the controller, but not for bridges. So that
is what was used to differentiate between the two. Starting with Falcon
Ridge bridges and controllers received different device ids.
Additionally on some MacBookPro models (but not all) the
subvendor/subdevice was zeroed.

Starting with a42fb351c (thunderbolt: Allow loading of module on recent
Apple MacBooks with thunderbolt 2 controller) the thunderbolt driver
binds to all Falcon Ridge 4C controllers (irregardless of
subvendor/subdevice). The corresponding quirk was not updated.

This commit changes the quirk to check the device class instead of its
subvendor-/subdeviceids. This works for all generations of Thunderbolt
controllers.

Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
Reviewed-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-31 13:25:02 +02:00
Linus Torvalds
2a90309e06 powerpc fixes for 4.8 #4
Andrew Donnellan (1):
       cxl: use pcibios_free_controller_deferred() when removing vPHBs
 
 Andrzej Hajda (1):
       powerpc/powernv/pci: fix iterator signedness
 
 Boqun Feng (1):
       powerpc, hotplug: Avoid to touch non-existent cpumasks.
 
 Christophe Leroy (1):
       powerpc: sysdev: cpm: fix gpio save_regs functions
 
 Cyril Bur (1):
       powerpc: signals: Discard transaction state from signal frames
 
 Guenter Roeck (1):
       powerpc: cputhreads: Add missing include file
 
 Markus Elfring (3):
       drivers/macintosh: Delete owner assignment
       powerpc/512x: Delete unnecessary assignment for the field "owner"
       powerpc: mpc8349emitx: Delete unnecessary assignment for the field "owner"
 
 Mauricio Faria de Oliveira (1):
       powerpc/pseries: use pci_host_bridge.release_fn() to kfree(phb)
 
 Michael Ellerman (1):
       powerpc/prom: Fix sub-processor option passed to ibm, client-architecture-support
 
 Mukesh Ojha (1):
       powerpc/powernv : Drop reference added by kset_find_obj()
 
 Nicholas Piggin (3):
       powerpc/pseries: PACA save area fix for general exception vs MCE
       powerpc/pseries: PACA save area fix for MCE vs MCE
       powerpc/tm: do not use r13 for tabort_syscall
 
 Paolo Bonzini (1):
       powerpc: move hmi.c to arch/powerpc/kvm/
 
 Paul Gortmaker (1):
       powerpc: migrate exception table users off module.h and onto extable.h
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Merge tag 'powerpc-4.8-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Ben Herrenschmidt:
 "This was meant to be sent early last week, but I has a change pending
  on one of the fixes and other things made me forget all about.  Ugh.

  We have some misc fixes for powerpc 4.8.  Some trivial bits and some
  regressions, and a trivial cleanup or two that I saw no point in
  letting rot in patchwork"

* tag 'powerpc-4.8-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc: signals: Discard transaction state from signal frames
  powerpc/powernv : Drop reference added by kset_find_obj()
  powerpc/tm: do not use r13 for tabort_syscall
  powerpc: move hmi.c to arch/powerpc/kvm/
  powerpc: sysdev: cpm: fix gpio save_regs functions
  powerpc/pseries: PACA save area fix for MCE vs MCE
  powerpc/pseries: PACA save area fix for general exception vs MCE
  powerpc/prom: Fix sub-processor option passed to ibm, client-architecture-support
  powerpc, hotplug: Avoid to touch non-existent cpumasks.
  powerpc: migrate exception table users off module.h and onto extable.h
  powerpc/powernv/pci: fix iterator signedness
  powerpc/pseries: use pci_host_bridge.release_fn() to kfree(phb)
  cxl: use pcibios_free_controller_deferred() when removing vPHBs
  powerpc: mpc8349emitx: Delete unnecessary assignment for the field "owner"
  powerpc/512x: Delete unnecessary assignment for the field "owner"
  drivers/macintosh: Delete owner assignment
  powerpc: cputhreads: Add missing include file
2016-08-29 12:12:15 -07:00
Linus Torvalds
219c04cea3 PCI updates for v4.8:
Resource management
     Update "pci=resource_alignment" documentation (Mathias Koehrer)
 
   MSI
     Use positive flags in pci_alloc_irq_vectors() (Christoph Hellwig)
     Call pci_intx() when using legacy interrupts in pci_alloc_irq_vectors() (Christoph Hellwig)
 
   Intel VMD host bridge driver
     Fix infinite loop executing irq's (Keith Busch)
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Merge tag 'pci-v4.8-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:
 "Resource management:
   - Update "pci=resource_alignment" documentation (Mathias Koehrer)

  MSI:
   - Use positive flags in pci_alloc_irq_vectors() (Christoph Hellwig)
   - Call pci_intx() when using legacy interrupts in pci_alloc_irq_vectors() (Christoph Hellwig)

  Intel VMD host bridge driver:
   - Fix infinite loop executing irq's (Keith Busch)"

* tag 'pci-v4.8-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  x86/PCI: VMD: Fix infinite loop executing irq's
  PCI: Call pci_intx() when using legacy interrupts in pci_alloc_irq_vectors()
  PCI: Use positive flags in pci_alloc_irq_vectors()
  PCI: Update "pci=resource_alignment" documentation
2016-08-26 18:26:07 -07:00
Ley Foon Tan
31fc0ad47e PCI: altera: Rework config accessors for use without a struct pci_bus
Rework configs accessors so a future patch can use them in _probe() with
struct altera_pcie instead of struct pci_bus.

Signed-off-by: Ley Foon Tan <lftan@altera.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-08-26 14:18:59 -05:00
Bjorn Helgaas
8b2ec318ee PCI: Add PTM clock granularity information
The PTM Control register (PCIe r3.1, sec 7.32.3) contains an Effective
Granularity field:

  This provides information relating to the expected accuracy of the PTM
  clock, but does not otherwise affect the PTM mechanism.

Set the Effective Granularity based on the PTM Root and any intervening PTM
Time Sources.

This does not set Effective Granularity for Root Complex Integrated
Endpoints because I don't know how to figure out clock granularity for
them.  The spec says:

  ... system software must set [Effective Granularity] to the value
  reported in the Local Clock Granularity field by the associated PTM
  Time Source.

but I don't know how to identify the associated PTM Time Source.  Normally
it's the upstream bridge, but an integrated endpoint has no upstream
bridge.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-08-25 08:32:34 -05:00
Paul Gortmaker
70626d8838 PCI: pciehp: Make explicitly non-modular
This code is not being built as a module by anyone:

  obj-$(CONFIG_HOTPLUG_PCI_PCIE)          += pciehp.o
  pciehp-objs                             := pciehp_core.o   \

  drivers/pci/pcie/Kconfig:config HOTPLUG_PCI_PCIE
  drivers/pci/pcie/Kconfig:  bool "PCI Express Hotplug driver"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Note that for non-modular code, module_init() translates to
device_initcall().  One could argue that we should use subsys_initcall()
here, but for now we stick with runtime equivalence.

We delete module.h but we keep the moduleparam.h include, since we are
keeping the module_param() that the file has as-is for now.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Kristen Carlson Accardi <kristen@linux.intel.com>
2016-08-24 17:28:56 -05:00
Paul Gortmaker
57b51b9adb PCI: hotplug: Make core explicitly non-modular
This code is not being built as a module by anyone:

  obj-$(CONFIG_HOTPLUG_PCI)           += pci_hotplug.o
  [...]
  pci_hotplug-objs                    := pci_hotplug_core.o

  drivers/pci/hotplug/Kconfig:menuconfig HOTPLUG_PCI
  drivers/pci/hotplug/Kconfig:  bool "Support for PCI Hotplug"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Remove orphaned exit function in cpci_hotplug_core.c.

Note that for non-modular code, module_init() translates to
device_initcall().  One could argue that we should use subsys_initcall()
here, but for now we stick with runtime equivalence.

We would delete module.h and just keep the moduleparam.h include (since the
file does use module_param), but there is a try_module_get and module_put
pairing that prevents us from doing that.

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Scott Murray <scott@spiteful.org>
CC: Kristen Carlson Accardi <kristen@linux.intel.com>
2016-08-24 17:20:14 -05:00
Paul Gortmaker
ff187e777c PCI: xilinx-nwl: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCIE_XILINX_NWL
  drivers/pci/host/Kconfig:  bool "NWL PCIe Core"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Explicitly disallow driver unbind, since that doesn't have a sensible use
case anyway, and it allows us to drop the ".remove" code for non-modular
drivers.  Delete several functions only used by the remove function.

Note that for non-modular code, builtin_platform_driver() uses the same
init level priority as module_platform_driver(), so this doesn't change
init ordering.

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Michal Simek <michal.simek@xilinx.com>
CC: "Sören Brinkmann" <soren.brinkmann@xilinx.com>
CC: Marc Zyngier <marc.zyngier@arm.com>
CC: Bharat Kumar Gogada <bharat.kumar.gogada@xilinx.com>
2016-08-24 17:18:17 -05:00
Paul Gortmaker
da4eafcae3 PCI: xilinx: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCIE_XILINX
  drivers/pci/host/Kconfig:  bool "Xilinx AXI PCIe host bridge support"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Note that for non-modular code, builtin_platform_driver() uses the same
init level priority as module_platform_driver(), so this doesn't change
init ordering.

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Michal Simek <michal.simek@xilinx.com>
CC: "Sören Brinkmann" <soren.brinkmann@xilinx.com>
2016-08-24 17:16:32 -05:00
Paul Gortmaker
f9a6660083 PCI: qcom: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCIE_QCOM
  drivers/pci/host/Kconfig:  bool "Qualcomm PCIe controller"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Note that for non-modular code, MODULE_DEVICE_TABLE is a no-op and
builtin_platform_driver() uses the same init level priority as
module_platform_driver(), so this doesn't change init ordering.

Explicitly disallow driver unbind, since that doesn't have a sensible use
case anyway, and it allows us to drop the ".remove" code for non-modular
drivers.

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Stanimir Varbanov <svarbanov@mm-sol.com>
2016-08-24 17:16:19 -05:00
Paul Gortmaker
d29438d644 PCI: dra7xx: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCI_DRA7XX
  drivers/pci/host/Kconfig:  bool "TI DRA7xx PCIe controller"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Note that for non-modular code, MODULE_DEVICE_TABLE is a no-op and
builtin_platform_driver_probe() uses the same init level priority as
module_platform_driver_probe(), so this doesn't change init ordering.

Explicitly disallow driver unbind, since that doesn't have a sensible use
case anyway, and it allows us to drop the ".remove" code for non-modular
drivers.

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Kishon Vijay Abraham I <kishon@ti.com>
2016-08-24 17:02:05 -05:00
Paul Gortmaker
8756336c1d PCI/AER: Make explicitly non-modular
This code is not being built as a module by anyone:

  obj-$(CONFIG_PCIEAER) += aerdriver.o
  aerdriver-objs := aerdrv_errprint.o aerdrv_core.o aerdrv.o

  drivers/pci/pcie/aer/Kconfig:config PCIEAER
  drivers/pci/pcie/aer/Kconfig:  bool "Root Port Advanced Error Reporting support"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Note that for non-modular code, module_init() translates to
device_initcall().

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Tom Long Nguyen <tom.l.nguyen@intel.com>
2016-08-24 16:59:57 -05:00
Paul Gortmaker
d7def20400 PCI/PME: Make explicitly non-modular
This code is not being built as a module by anyone:

  config PCIE_PME
        def_bool y
        depends on PCIEPORTBUS && PM

Remove traces of modularity so that when reading the driver there is no
doubt it is builtin-only.

Also delete the .remove function, since that doesn't seem to have a
sensible use case.  With "normal" endpoint drivers, we have in the past set
the suppress_bind_attrs bit to make it clear that the use of ".remove" in a
builtin driver was deleted, but here for PCI, it seems overkill to jump
through the pcie_port_service_driver and into the struct device_driver in
order to finally try and do something similar with the bind setting.

Note that for non-modular code, module_init() translates to
device_initcall().

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-08-24 16:56:12 -05:00
Paul Gortmaker
61612e6dd4 PCI: Make DPC explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/pcie/Kconfig:config PCIE_DPC
  drivers/pci/pcie/Kconfig:  bool "PCIe Downstream Port Containment support"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Note that for non-modular code, module_init() translates to
device_initcall().

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Keith Busch <keith.busch@intel.com>
CC: Mika Westerberg <mika.westerberg@linux.intel.com>
2016-08-24 16:52:24 -05:00
Paul Gortmaker
4068bd192a PCI: generic: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCI_HOST_COMMON
  drivers/pci/host/Kconfig:  bool

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Will Deacon <will.deacon@arm.com>
2016-08-24 14:21:01 -05:00
Wei Yongjun
639c532325 PCI: designware: Remove redundant platform_get_resource() return value check
devm_ioremap_resource() fails gracefully when given a NULL resource
pointer, so we don't need to check separately for failure from
platform_get_resource_byname().  Remove the redundant check.

[bhelgaas: changelog]
Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-08-23 16:55:18 -05:00
Dong Bo
68a0bfec72 PCI: designware: Exchange viewport of MEMORYs' and CFGs/IOs'
When we have only two view ports in a DesignWare PCIe platform, iatu0
is used for both CFG and IO accesses.  When CFGs are sent to peripherals
(e.g., lspci), iatu0 frequently switches between CFG and IO.

For such scenarios, a MEMORY might be sent as an IOs by mistake.
Considering the following configurations:

  MEMORY  ->   BASE_ADDR: 0xb4100000, LIMIT: 0xb4100FFF, TYPE=mem
  CFG     ->   BASE_ADDR: 0xb4000000, LIMIT: 0xb4000FFF, TYPE=cfg
  IO      ->   BASE_ADDR: 0xFFFFFFFF, LIMIT: 0xFFFFFFFE, TYPE=io

Suppose PCIe has just completed a CFG access.  To switch back to IO, it
sets the BASE_ADDR to 0xFFFFFFFF, LIMIT 0xFFFFFFFE and TYPE to IO.  When
another CFG comes, the BASE_ADDR is set to 0xb4000000 to switch to CFG.  At
this moment, a MEMORY access shows up, since it matches with iatu0 (due to
0xb4000000 <= MEMORY BASE_ADDR <= MEMORY LIMIT <= 0xFFFFFFF), it is treated
as an IO access by mistake, then sent to perpheral.

This patch fixes the problem by exchanging the assignments of `MEMORYs' and
`CFGs/IOs', which assigning MEMORYs to iatu0, CFGs and IOs to iatu1.

We can still have issues with IO transfer, however memory transfer is used
predominantly therefore we are just minimizing the risk of failure.
Actually, we can not do much when we have only two viewports.  We can
either not allow the less frequent IO transfers at all, or can live with a
remote possibility of getting it corrupted.

Signed-off-by: Dong Bo <dongbo4@huawei.com>
[pratyush.anand@gmail.com: Modified commit log to capture remote risk]
Signed-off-by: Pratyush Anand <pratyush.anand@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-08-23 16:55:16 -05:00
Paul Gortmaker
caf5548caa PCI: exynos: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCI_EXYNOS
  drivers/pci/host/Kconfig:  bool "Samsung Exynos PCIe controller"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Note that for non-modular code, MODULE_DEVICE_TABLE is a no-op.

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
CC: Jingoo Han <jingoohan1@gmail.com>
CC: Kukjin Kim <kgene@kernel.org>
2016-08-23 15:44:07 -05:00
Paul Gortmaker
e41faf0779 PCI: designware: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCIE_DW
  drivers/pci/host/Kconfig:  bool

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Jingoo Han <jingoohan1@gmail.com>
CC: Pratyush Anand <pratyush.anand@gmail.com>
2016-08-23 15:43:59 -05:00
Paul Gortmaker
56540c77c5 PCI: spear: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCIE_SPEAR13XX
  drivers/pci/host/Kconfig:  bool "STMicroelectronics SPEAr PCIe controller"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Note that for non-modular code, MODULE_DEVICE_TABLE is a no-op and
module_init() translates to device_initcall().

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Pratyush Anand <pratyush.anand@gmail.com>
2016-08-23 15:43:51 -05:00
Paul Gortmaker
a7dadf45ae PCI: portdrv: Make explicitly non-modular
This code is not being built as a module by anyone:

  pcieportdrv-y               := portdrv_core.o portdrv_pci.o portdrv_bus.o
  obj-$(CONFIG_PCIEPORTBUS)   += pcieportdrv.o

  drivers/pci/pcie/Kconfig:config PCIEPORTBUS
  drivers/pci/pcie/Kconfig:  bool "PCI Express Port Bus support"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Note that for non-modular code, MODULE_DEVICE_TABLE is a no-op and
module_init() translates to device_initcall().

[bhelgaas: changelog, remove unused DRIVER_* macros]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Tom Long Nguyen <tom.l.nguyen@intel.com>
2016-08-23 15:34:23 -05:00
Paul Gortmaker
f90d8e84c3 PCI: imx6: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCI_IMX6
  drivers/pci/host/Kconfig:  bool "Freescale i.MX6 PCIe controller"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Note that for non-modular code, MODULE_DEVICE_TABLE is a no-op and
module_init() translates to device_initcall().

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Richard Zhu <Richard.Zhu@freescale.com>
CC: Lucas Stach <l.stach@pengutronix.de>
2016-08-23 15:34:15 -05:00
Paul Gortmaker
bb9b54ca37 PCI: altera: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCIE_ALTERA
  drivers/pci/host/Kconfig:  bool "Altera PCIe controller"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Note that for non-modular code, MODULE_DEVICE_TABLE is a no-op and
module_init() translates to device_initcall().

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Ley Foon Tan <lftan@altera.com>
2016-08-23 15:34:08 -05:00
Paul Gortmaker
18224b3a73 PCI: altera: Make MSI explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCIE_ALTERA_MSI
  drivers/pci/host/Kconfig:  bool "Altera PCIe MSI feature"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Ley Foon Tan <lftan@altera.com>
2016-08-23 15:13:27 -05:00
Wei Yongjun
8b22335afe PCI: aardvark: Remove redundant dev_err call in advk_pcie_probe()
devm_ioremap_resource() emits an error message already, so remove the
dev_err() call in advk_pcie_probe() to avoid redundant error messages.

Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2016-08-22 14:36:50 -05:00
Wei Yongjun
4f1cb01a78 PCI: hv: Use list_move_tail() instead of list_del() + list_add_tail()
Use list_move_tail() instead of list_del() + list_add_tail().  No
functional change intended

Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-08-22 14:35:38 -05:00
Wei Yongjun
8116acce5a PCI: keystone: Propagate request_irq() failure
Previously, if request_irq() failed, ks_add_pcie_port() always returned
zero (success).  Return the request_irq() failure result instead.

[bhelgaas: changelog]
Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-By: Murali Karicheri <m-karicheri2@ti.com>
2016-08-22 14:28:42 -05:00
Bjorn Helgaas
51afa3cc2d PCI: rcar: Consolidate register space lookup and ioremap
Move the devm_ioremap_resource() of R-Car register space next to the
of_address_to_resource() that extracts the resource.  No functional change
intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
2016-08-22 14:16:38 -05:00
Pratyush Anand
fe48cb8538 PCI: designware: Keep viewport fixed for IO transaction if num_viewport > 2
Most of the platforms have 3 or more viewports.  For such platforms, We do
not need to share viewports between IO and CFG.  Assign viewport 2 to IO
transactions in such cases.

Tested-by: Dong Bo <dongbo4@huawei.com>
Signed-off-by: Pratyush Anand <pratyush.anand@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rob Herring <robh@kernel.org>
2016-08-22 12:34:43 -05:00
Keith Busch
8b7c8b46f1 PCI: pciehp: Clear attention LED on device add
Clear the LED attention status after a successful device add.  It is
possible the attention LED was on from a previous power fault or link
failure, and a subsequent successful device insert insertion should clear
it.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-08-22 11:57:41 -05:00
Andrew Donnellan
6f38a8b9a4 cxl: use pcibios_free_controller_deferred() when removing vPHBs
When cxl removes a vPHB, it's possible that the pci_controller may be freed
before all references to the devices on the vPHB have been released. This
in turn causes an invalid memory access when the devices are eventually
released, as pcibios_release_device() attempts to call the phb's
release_device hook.

In cxl_pci_vphb_remove(), remove the existing call to
pcibios_free_controller(). Instead, use
pcibios_free_controller_deferred() to free the pci_controller after all
devices have been released. Export pci_set_host_bridge_release() so we can
do this.

Cc: stable@vger.kernel.org
Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Reviewed-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2016-08-22 11:09:33 +10:00
Bjorn Helgaas
eec097d431 PCI: Add pci_enable_ptm() for drivers to enable PTM on endpoints
Add an pci_enable_ptm() interface so drivers can enable PTM.

The PCI core enables PTM on PTM Roots and switches automatically, but we
don't enable PTM on endpoints unless a driver requests it.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-08-18 16:04:57 -05:00
Thierry Reding
c460af94c3 PCI: tegra: Use of_device_get_match_data()
of_device_get_match_data() was added in v4.2 to reduce the the boilerplate
required to get at SoC-specific data.  Use it to simplify the code
slightly.

[bhelgaas: changelog]
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-08-18 15:41:41 -05:00
Thierry Reding
a7fbae2139 PCI: tegra: Remove redundant _data suffix
The struct tegra_pcie_soc_data represents SoC-specific data.  The shorter
name tegra_pcie_soc already describes that accurately enough, so the extra
five characters are redundant.  Also remove the suffix from various
variable names to shorten the code a little.

This also makes this driver more consistent with the naming used in other
drivers that use a similar mechanism to differentiate between various SoC
generations.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-08-18 15:41:06 -05:00
Maik Broemme
8e2e031799 PCI: Mark Atheros AR9580 to avoid bus reset
Similar to the AR93xx and the AR94xx series, the AR95xx also have the same
quirk for the Bus Reset.  It will lead to instant system reset if the
device is assigned via VFIO to a KVM VM.  I've been able reproduce this
behavior with a MikroTik R11e-2HnD.

Fixes: c3e59ee4e7 ("PCI: Mark Atheros AR93xx to avoid bus reset")
Signed-off-by: Maik Broemme <mbroemme@libmpq.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org	# v3.14+
2016-08-18 15:36:30 -05:00
Ley Foon Tan
411dc32d88 PCI: altera: Poll for link training status after retraining the link
Poll for link training status is cleared before poll for link up status.
This can help to get the reliable link up status, especially when PCIe is
in Gen 3 speed.

Signed-off-by: Ley Foon Tan <lftan@altera.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-08-18 15:12:53 -05:00
Christoph Hellwig
5d0bdf2867 PCI: Call pci_intx() when using legacy interrupts in pci_alloc_irq_vectors()
ahci currently insists on an explicit call to pci_intx() before falling
back from MSI or MSI-X to legacy IRQs.  As pci_intx() is a no-op if the
command register already contains the right value it seems safe and useful
to add this call to pci_alloc_irq_vectors() so that ahci can just use
pci_alloc_irq_vectors().

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-08-18 08:02:40 -05:00
Jisheng Zhang
01c076732e PCI: designware: Check LTSSM training bit before deciding link is up
The link may be up but still in link training.  In this case, we can't
think the link is up and operating correctly.  Teach dw_pcie_link_up() to
be aware of the PCIE_PHY_DEBUG_R1_LINK_IN_TRAINING bit.

Also rewrite PCIE_PHY_DEBUG_R1_LINK_UP definition so that it's consistent
with other macros.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Joao Pinto <jpinto@synopsys.com>
2016-08-18 08:00:44 -05:00
Rui Wang
584c5c422f x86/ioapic: Support hot-removal of IOAPICs present during boot
IOAPICs present during system boot aren't added to ioapic_list,
thus are unable to be hot-removed. Fix it by calling
acpi_ioapic_add() during root bus enumeration.

Signed-off-by: Rui Wang <rui.y.wang@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: helgaas@kernel.org
Cc: linux-acpi@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Cc: rjw@rjwysocki.net
Cc: tony.luck@intel.com
Link: http://lkml.kernel.org/r/1471420837-31003-3-git-send-email-rui.y.wang@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-08-18 11:45:18 +02:00
Joao Pinto
a0601a4705 PCI: designware: Add iATU Unroll feature
Add support for the new iATU Unroll mechanism that will be used from Core
version 4.80.  The new Cores can support either iATU Unroll or the "old"
iATU method, now called Legacy Mode.  The driver is perfectly capable of
performing well for both.

[bhelgaas: split ATU enable timeout to separate patch]
Signed-off-by: Joao Pinto <jpinto@synopsys.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-08-17 14:48:09 -05:00
Joao Pinto
d8bbeb39fb PCI: designware: Wait for iATU enable
Add a loop with timeout to make sure the iATU is really enabled before
subsequent config and I/O accesses.

[bhelgaas: split to separate patch, use dev_err() instead of dev_dbg()]
Signed-off-by: Joao Pinto <jpinto@synopsys.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-08-17 14:43:41 -05:00
Joao Pinto
c388de1c4f PCI: designware: Move link wait definitions to .c file
Move the link wait sleep definitions to the .c file as suggested by
Jisheng Zhang in a previous patch.

Signed-off-by: Joao Pinto <jpinto@synopsys.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Jisheng Zhang <jszhang@marvell.com>
2016-08-17 14:43:39 -05:00
Bjorn Helgaas
446fc23fb6 PCI: designware: Return data directly from dw_pcie_readl_rc()
dw_pcie_readl_rc() reads a u32 value.  Previously we stored that value in
space supplied by the caller.  Return the u32 value directly instead.

This makes the calling code read better and makes it obvious that the
caller need not initialize the storage.  In the following example it isn't
clear whether "val" is initialized before being used:

  dw_pcie_readl_rc(pp, PCI_COMMAND, &val);
  if (val & PCI_COMMAND_MEMORY)
    ...

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-08-17 14:43:38 -05:00
Christoph Hellwig
4fe0d15488 PCI: Use positive flags in pci_alloc_irq_vectors()
Instead of passing negative flags like PCI_IRQ_NOMSI to prevent use of
certain interrupt types, pass positive flags like PCI_IRQ_LEGACY,
PCI_IRQ_MSI, etc., to specify the acceptable interrupt types.

This is based on a number of pending driver conversions that just happend
to be a whole more obvious to read this way, and given that we have no
users in the tree yet it can still easily be done.

I've also added a PCI_IRQ_ALL_TYPES catchall to keep the case of accepting
all interrupt types very simple.

[bhelgaas: changelog, fix PCI_IRQ_AFFINITY doc typo, remove mention of
PCI_IRQ_NOLEGACY]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alexander Gordeev <agordeev@redhat.com>
2016-08-16 14:07:30 -05:00
Jonathan Yong
9bb04a0c4e PCI: Add Precision Time Measurement (PTM) support
Add Precision Time Measurement (PTM) support (see PCIe r3.1, sec 6.22).

Enable PTM on PTM Root devices and switch ports.  This does not enable PTM
on endpoints.

There currently are no PTM-capable devices on the market, but it is
expected to be supported by the Intel Apollo Lake platform.

[bhelgaas: complete rework]
Signed-off-by: Jonathan Yong <jonathan.yong@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-08-15 13:44:08 -05:00
Lukas Wunner
ad618c9983 PCI: Drop CONFIG_KEXEC_CORE ifdeffery
Drop the CONFIG_KEXEC_CORE #ifdef around reference to "kexec_in_progress".

Commit 2b94ed2458 ("kexec: define kexec_in_progress in !CONFIG_KEXEC
case") has made this unnecessary.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-08-09 11:56:04 -05:00
Marc Zyngier
f3b0946d62 genirq/msi: Make sure PCI MSIs are activated early
Bharat Kumar Gogada reported issues with the generic MSI code, where the
end-point ended up with garbage in its MSI configuration (both for the vector
and the message).

It turns out that the two MSI paths in the kernel are doing slightly different
things:

generic MSI: disable MSI -> allocate MSI -> enable MSI -> setup EP
PCI MSI: disable MSI -> allocate MSI -> setup EP -> enable MSI

And it turns out that end-points are allowed to latch the content of the MSI
configuration registers as soon as MSIs are enabled.  In Bharat's case, the
end-point ends up using whatever was there already, which is not what you
want.

In order to make things converge, we introduce a new MSI domain flag
(MSI_FLAG_ACTIVATE_EARLY) that is unconditionally set for PCI/MSI. When set,
this flag forces the programming of the end-point as soon as the MSIs are
allocated.

A consequence of this is that we have an extra activate in irq_startup, but
that should be without much consequence.

tglx: 

 - Several people reported a VMWare regression with PCI/MSI-X passthrough. It
   turns out that the patch also cures that issue.

 - We need to have a look at the MSI disable interrupt path, where we write
   the msg to all zeros without disabling MSI in the PCI device. Is that
   correct?

Fixes: 52f518a3a7 "x86/MSI: Use hierarchical irqdomains to manage MSI interrupts"
Reported-and-tested-by: Bharat Kumar Gogada <bharat.kumar.gogada@xilinx.com>
Reported-and-tested-by: Foster Snowhill <forst@forstwoof.ru>
Reported-by: Matthias Prager <linux@matthiasprager.de>
Reported-by: Jason Taylor <jason.taylor@simplivity.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1468426713-31431-1-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-08-09 09:19:32 +02:00
Rafael J. Wysocki
dd7fd3a82c ACPI / hotplug / PCI: Runtime resume bridges before bus rescans
If a PCI bridge (or PCIe port) that is runtime-suspended gets an ACPI
hotplug notification, such as a bus check, it has to be resumed before
re-scanning the devices below it, or those devices will not be
accessible and will be treated as hot-removed.

Make that happen and let the bridge suspend again after the bus below it
has been re-scanned.

This is a replacement for commit 16468c783c ("ACPI / hotplug / PCI:
Runtime resume bridge before rescan") that has been reverted, because it
introduced a system resume regression (due to missing bridge->pci_dev
checks that are necessary in case the notification is targeted at the
host bridge) and it is necessary for the code added by commit
006d44e49a ("PCI: Add runtime PM support for PCIe ports") to work as
expected.

Tested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-04 21:33:58 -04:00
Linus Torvalds
d597690eef Merge branch 'akpm' (patches from Andrew)
Merge even more updates from Andrew Morton:

 - dma-mapping API cleanup

 - a few cleanups and misc things

 - use jump labels in dynamic-debug

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  dynamic_debug: add jump label support
  jump_label: remove bug.h, atomic.h dependencies for HAVE_JUMP_LABEL
  arm: jump label may reference text in __exit
  tile: support static_key usage in non-module __exit sections
  sparc: support static_key usage in non-module __exit sections
  powerpc: add explicit #include <asm/asm-compat.h> for jump label
  drivers/media/dvb-frontends/cxd2841er.c: avoid misleading gcc warning
  MAINTAINERS: update email and list of Samsung HW driver maintainers
  block: remove BLK_DEV_DAX config option
  samples/kretprobe: fix the wrong type
  samples/kretprobe: convert the printk to pr_info/pr_err
  samples/jprobe: convert the printk to pr_info/pr_err
  samples/kprobe: convert the printk to pr_info/pr_err
  dma-mapping: use unsigned long for dma_attrs
  media: mtk-vcodec: remove unused dma_attrs
  include/linux/bitmap.h: cleanup
  tree-wide: replace config_enabled() with IS_ENABLED()
  drivers/fpga/Kconfig: fix build failure
2016-08-04 08:51:12 -04:00
Masahiro Yamada
97f2645f35 tree-wide: replace config_enabled() with IS_ENABLED()
The use of config_enabled() against config options is ambiguous.  In
practical terms, config_enabled() is equivalent to IS_BUILTIN(), but the
author might have used it for the meaning of IS_ENABLED().  Using
IS_ENABLED(), IS_BUILTIN(), IS_MODULE() etc.  makes the intention
clearer.

This commit replaces config_enabled() with IS_ENABLED() where possible.
This commit is only touching bool config options.

I noticed two cases where config_enabled() is used against a tristate
option:

 - config_enabled(CONFIG_HWMON)
  [ drivers/net/wireless/ath/ath10k/thermal.c ]

 - config_enabled(CONFIG_BACKLIGHT_CLASS_DEVICE)
  [ drivers/gpu/drm/gma500/opregion.c ]

I did not touch them because they should be converted to IS_BUILTIN()
in order to keep the logic, but I was not sure it was the authors'
intention.

Link: http://lkml.kernel.org/r/1465215656-20569-1-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Stas Sergeev <stsp@list.ru>
Cc: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: Joshua Kinard <kumba@gentoo.org>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: "Dmitry V. Levin" <ldv@altlinux.org>
Cc: yu-cheng yu <yu-cheng.yu@intel.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Will Drewry <wad@chromium.org>
Cc: Nikolay Martynov <mar.kolya@gmail.com>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Cc: Rafal Milecki <zajec5@gmail.com>
Cc: James Cowgill <James.Cowgill@imgtec.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Alex Smith <alex.smith@imgtec.com>
Cc: Adam Buchbinder <adam.buchbinder@gmail.com>
Cc: Qais Yousef <qais.yousef@imgtec.com>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Mikko Rapeli <mikko.rapeli@iki.fi>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
Cc: "Luis R. Rodriguez" <mcgrof@do-not-panic.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Roland McGrath <roland@hack.frob.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Kalle Valo <kvalo@qca.qualcomm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Tony Wu <tung7970@gmail.com>
Cc: Huaitong Han <huaitong.han@intel.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Juergen Gross <jgross@suse.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andrea Gelmini <andrea.gelmini@gelma.net>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Rabin Vincent <rabin@rab.in>
Cc: "Maciej W. Rozycki" <macro@imgtec.com>
Cc: David Daney <david.daney@cavium.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-04 08:50:07 -04:00
Linus Torvalds
96b585267f Revert "ACPI / hotplug / PCI: Runtime resume bridge before rescan"
This reverts commit 16468c783c.

Bisection showed that it was the root cause for a resume hang on a
bog-standard all-Intel laptop (Sony Vaio Pro 11), and reverting fixes
the hang.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-03 22:20:22 -04:00
Linus Torvalds
d52bd54db8 Merge branch 'akpm' (patches from Andrew)
Merge yet more updates from Andrew Morton:

 - the rest of ocfs2

 - various hotfixes, mainly MM

 - quite a bit of misc stuff - drivers, fork, exec, signals, etc.

 - printk updates

 - firmware

 - checkpatch

 - nilfs2

 - more kexec stuff than usual

 - rapidio updates

 - w1 things

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (111 commits)
  ipc: delete "nr_ipc_ns"
  kcov: allow more fine-grained coverage instrumentation
  init/Kconfig: add clarification for out-of-tree modules
  config: add android config fragments
  init/Kconfig: ban CONFIG_LOCALVERSION_AUTO with allmodconfig
  relay: add global mode support for buffer-only channels
  init: allow blacklisting of module_init functions
  w1:omap_hdq: fix regression
  w1: add helper macro module_w1_family
  w1: remove need for ida and use PLATFORM_DEVID_AUTO
  rapidio/switches: add driver for IDT gen3 switches
  powerpc/fsl_rio: apply changes for RIO spec rev 3
  rapidio: modify for rev.3 specification changes
  rapidio: change inbound window size type to u64
  rapidio/idt_gen2: fix locking warning
  rapidio: fix error handling in mbox request/release functions
  rapidio/tsi721_dma: advance queue processing from transfer submit call
  rapidio/tsi721: add messaging mbox selector parameter
  rapidio/tsi721: add PCIe MRRS override parameter
  rapidio/tsi721_dma: add channel mask and queue size parameters
  ...
2016-08-02 21:08:07 -04:00
Fabian Frederick
bd721ea73e treewide: replace obsolete _refok by __ref
There was only one use of __initdata_refok and __exit_refok

__init_refok was used 46 times against 82 for __ref.

Those definitions are obsolete since commit 312b1485fb ("Introduce new
section reference annotations tags: __ref, __refdata, __refconst")

This patch removes the following compatibility definitions and replaces
them treewide.

/* compatibility defines */
#define __init_refok     __ref
#define __initdata_refok __refdata
#define __exit_refok     __ref

I can also provide separate patches if necessary.
(One patch per tree and check in 1 month or 2 to remove old definitions)

[akpm@linux-foundation.org: coding-style fixes]
Link: http://lkml.kernel.org/r/1466796271-3043-1-git-send-email-fabf@skynet.be
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-02 17:31:41 -04:00
Linus Torvalds
c8d0267efd PCI changes for the v4.8 merge window:
Enumeration
     Move ecam.h to linux/include/pci-ecam.h (Jayachandran C)
     Add parent device field to ECAM struct pci_config_window (Jayachandran C)
     Add generic MCFG table handling (Tomasz Nowicki)
     Refactor pci_bus_assign_domain_nr() for CONFIG_PCI_DOMAINS_GENERIC (Tomasz Nowicki)
     Factor DT-specific pci_bus_find_domain_nr() code out (Tomasz Nowicki)
 
   Resource management
     Add devm_request_pci_bus_resources() (Bjorn Helgaas)
     Unify pci_resource_to_user() declarations (Bjorn Helgaas)
     Implement pci_resource_to_user() with pcibios_resource_to_bus() (microblaze, powerpc, sparc) (Bjorn Helgaas)
     Request host bridge window resources (designware, iproc, rcar, xgene, xilinx, xilinx-nwl) (Bjorn Helgaas)
     Make PCI I/O space optional on ARM32 (Bjorn Helgaas)
     Ignore write combining when mapping I/O port space (Bjorn Helgaas)
     Claim bus resources on MIPS PCI_PROBE_ONLY set-ups (Bjorn Helgaas)
     Remove unicore32 pci=firmware command line parameter handling (Bjorn Helgaas)
     Support I/O resources when parsing host bridge resources (Jayachandran C)
     Add helpers to request/release memory and I/O regions (Johannes Thumshirn)
     Use pci_(request|release)_mem_regions (NVMe, lpfc, GenWQE, ethernet/intel, alx) (Johannes Thumshirn)
     Extend pci=resource_alignment to specify device/vendor IDs (Koehrer Mathias (ETAS/ESW5))
     Add generic pci_bus_claim_resources() (Lorenzo Pieralisi)
     Claim bus resources on ARM32 PCI_PROBE_ONLY set-ups (Lorenzo Pieralisi)
     Remove ARM32 and ARM64 arch-specific pcibios_enable_device() (Lorenzo Pieralisi)
     Add pci_unmap_iospace() to unmap I/O resources (Sinan Kaya)
     Remove powerpc __pci_mmap_set_pgprot() (Yinghai Lu)
 
   PCI device hotplug
     Allow additional bus numbers for hotplug bridges (Keith Busch)
     Ignore interrupts during D3cold (Lukas Wunner)
 
   Power management
     Enforce type casting for pci_power_t (Andy Shevchenko)
     Don't clear d3cold_allowed for PCIe ports (Mika Westerberg)
     Put PCIe ports into D3 during suspend (Mika Westerberg)
     Power on bridges before scanning new devices (Mika Westerberg)
     Runtime resume bridge before rescan (Mika Westerberg)
     Add runtime PM support for PCIe ports (Mika Westerberg)
     Remove redundant check of pcie_set_clkpm (Shawn Lin)
 
   Virtualization
     Add function 1 DMA alias quirk for Marvell 88SE9182 (Aaron Sierra)
     Add DMA alias quirk for Adaptec 3805 (Alex Williamson)
     Mark Atheros AR9485 and QCA9882 to avoid bus reset (Chris Blake)
     Add ACS quirk for Solarflare SFC9220 (Edward Cree)
 
   MSI
     Fix PCI_MSI dependencies (Arnd Bergmann)
     Add pci_msix_desc_addr() helper (Christoph Hellwig)
     Switch msix_program_entries() to use pci_msix_desc_addr() (Christoph Hellwig)
     Make the "entries" argument to pci_enable_msix() optional (Christoph Hellwig)
     Provide sensible IRQ vector alloc/free routines (Christoph Hellwig)
     Spread interrupt vectors in pci_alloc_irq_vectors() (Christoph Hellwig)
 
   Error Handling
     Bind DPC to Root Ports as well as Downstream Ports (Keith Busch)
     Remove DPC tristate module option (Keith Busch)
     Convert Downstream Port Containment driver to use devm_* functions (Mika Westerberg)
 
   Generic host bridge driver
     Select IRQ_DOMAIN (Arnd Bergmann)
     Claim bus resources on PCI_PROBE_ONLY set-ups (Lorenzo Pieralisi)
 
   ACPI host bridge driver
     Add ARM64 acpi_pci_bus_find_domain_nr() (Tomasz Nowicki)
     Add ARM64 ACPI support for legacy IRQs parsing and consolidation with DT code (Tomasz Nowicki)
     Implement ARM64 AML accessors for PCI_Config region (Tomasz Nowicki)
     Support ARM64 ACPI-based PCI host controller (Tomasz Nowicki)
 
   Altera host bridge driver
     Check link status before retrain link (Ley Foon Tan)
     Poll for link up status after retraining the link (Ley Foon Tan)
 
   Axis ARTPEC-6 host bridge driver
     Add PCI_MSI_IRQ_DOMAIN dependency (Arnd Bergmann)
     Add DT binding for Axis ARTPEC-6 PCIe controller (Niklas Cassel)
     Add Axis ARTPEC-6 PCIe controller driver (Niklas Cassel)
 
   Intel VMD host bridge driver
     Use lock save/restore in interrupt enable path (Jon Derrick)
     Select device dma ops to override (Keith Busch)
     Initialize list item in IRQ disable (Keith Busch)
     Use x86_vector_domain as parent domain (Keith Busch)
     Separate MSI and MSI-X vector sharing (Keith Busch)
 
   Marvell Aardvark host bridge driver
     Add DT binding for the Aardvark PCIe controller (Thomas Petazzoni)
     Add Aardvark PCI host controller driver (Thomas Petazzoni)
     Add Aardvark PCIe support for Armada 3700 (Thomas Petazzoni)
 
   Microsoft Hyper-V host bridge driver
     Fix interrupt cleanup path (Cathy Avery)
     Don't leak buffer in hv_pci_onchannelcallback() (Vitaly Kuznetsov)
     Handle all pending messages in hv_pci_onchannelcallback() (Vitaly Kuznetsov)
 
   NVIDIA Tegra host bridge driver
     Program PADS_REFCLK_CFG* always, not just on legacy SoCs (Stephen Warren)
     Program PADS_REFCLK_CFG* registers with per-SoC values (Stephen Warren)
     Use lower-case hex consistently for register definitions (Thierry Reding)
     Use generic pci_remap_iospace() rather than ARM32-specific one (Thierry Reding)
     Stop setting pcibios_min_mem (Thierry Reding)
 
   Renesas R-Car host bridge driver
     Drop gen2 dummy I/O port region (Bjorn Helgaas)
 
   TI DRA7xx host bridge driver
     Fix return value in case of error (Christophe JAILLET)
 
   Xilinx AXI host bridge driver
     Fix return value in case of error (Christophe JAILLET)
 
   Miscellaneous
     Make bus_attr_resource_alignment static (Ben Dooks)
     Include <asm/dma.h> for isa_dma_bridge_buggy (Ben Dooks)
     MAINTAINERS: Add file patterns for PCI device tree bindings (Geert Uytterhoeven)
     Make host bridge drivers explicitly non-modular (Paul Gortmaker)
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Merge tag 'pci-v4.8-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:
 "Highlights:

   - ARM64 support for ACPI host bridges

   - new drivers for Axis ARTPEC-6 and Marvell Aardvark

   - new pci_alloc_irq_vectors() interface for MSI-X, MSI, legacy INTx

   - pci_resource_to_user() cleanup (more to come)

  Detailed summary:

  Enumeration:
   - Move ecam.h to linux/include/pci-ecam.h (Jayachandran C)
   - Add parent device field to ECAM struct pci_config_window (Jayachandran C)
   - Add generic MCFG table handling (Tomasz Nowicki)
   - Refactor pci_bus_assign_domain_nr() for CONFIG_PCI_DOMAINS_GENERIC (Tomasz Nowicki)
   - Factor DT-specific pci_bus_find_domain_nr() code out (Tomasz Nowicki)

  Resource management:
   - Add devm_request_pci_bus_resources() (Bjorn Helgaas)
   - Unify pci_resource_to_user() declarations (Bjorn Helgaas)
   - Implement pci_resource_to_user() with pcibios_resource_to_bus() (microblaze, powerpc, sparc) (Bjorn Helgaas)
   - Request host bridge window resources (designware, iproc, rcar, xgene, xilinx, xilinx-nwl) (Bjorn Helgaas)
   - Make PCI I/O space optional on ARM32 (Bjorn Helgaas)
   - Ignore write combining when mapping I/O port space (Bjorn Helgaas)
   - Claim bus resources on MIPS PCI_PROBE_ONLY set-ups (Bjorn Helgaas)
   - Remove unicore32 pci=firmware command line parameter handling (Bjorn Helgaas)
   - Support I/O resources when parsing host bridge resources (Jayachandran C)
   - Add helpers to request/release memory and I/O regions (Johannes Thumshirn)
   - Use pci_(request|release)_mem_regions (NVMe, lpfc, GenWQE, ethernet/intel, alx) (Johannes Thumshirn)
   - Extend pci=resource_alignment to specify device/vendor IDs (Koehrer Mathias (ETAS/ESW5))
   - Add generic pci_bus_claim_resources() (Lorenzo Pieralisi)
   - Claim bus resources on ARM32 PCI_PROBE_ONLY set-ups (Lorenzo Pieralisi)
   - Remove ARM32 and ARM64 arch-specific pcibios_enable_device() (Lorenzo Pieralisi)
   - Add pci_unmap_iospace() to unmap I/O resources (Sinan Kaya)
   - Remove powerpc __pci_mmap_set_pgprot() (Yinghai Lu)

  PCI device hotplug:
   - Allow additional bus numbers for hotplug bridges (Keith Busch)
   - Ignore interrupts during D3cold (Lukas Wunner)

  Power management:
   - Enforce type casting for pci_power_t (Andy Shevchenko)
   - Don't clear d3cold_allowed for PCIe ports (Mika Westerberg)
   - Put PCIe ports into D3 during suspend (Mika Westerberg)
   - Power on bridges before scanning new devices (Mika Westerberg)
   - Runtime resume bridge before rescan (Mika Westerberg)
   - Add runtime PM support for PCIe ports (Mika Westerberg)
   - Remove redundant check of pcie_set_clkpm (Shawn Lin)

  Virtualization:
   - Add function 1 DMA alias quirk for Marvell 88SE9182 (Aaron Sierra)
   - Add DMA alias quirk for Adaptec 3805 (Alex Williamson)
   - Mark Atheros AR9485 and QCA9882 to avoid bus reset (Chris Blake)
   - Add ACS quirk for Solarflare SFC9220 (Edward Cree)

  MSI:
   - Fix PCI_MSI dependencies (Arnd Bergmann)
   - Add pci_msix_desc_addr() helper (Christoph Hellwig)
   - Switch msix_program_entries() to use pci_msix_desc_addr() (Christoph Hellwig)
   - Make the "entries" argument to pci_enable_msix() optional (Christoph Hellwig)
   - Provide sensible IRQ vector alloc/free routines (Christoph Hellwig)
   - Spread interrupt vectors in pci_alloc_irq_vectors() (Christoph Hellwig)

  Error Handling:
   - Bind DPC to Root Ports as well as Downstream Ports (Keith Busch)
   - Remove DPC tristate module option (Keith Busch)
   - Convert Downstream Port Containment driver to use devm_* functions (Mika Westerberg)

  Generic host bridge driver:
   - Select IRQ_DOMAIN (Arnd Bergmann)
   - Claim bus resources on PCI_PROBE_ONLY set-ups (Lorenzo Pieralisi)

  ACPI host bridge driver:
   - Add ARM64 acpi_pci_bus_find_domain_nr() (Tomasz Nowicki)
   - Add ARM64 ACPI support for legacy IRQs parsing and consolidation with DT code (Tomasz Nowicki)
   - Implement ARM64 AML accessors for PCI_Config region (Tomasz Nowicki)
   - Support ARM64 ACPI-based PCI host controller (Tomasz Nowicki)

  Altera host bridge driver:
   - Check link status before retrain link (Ley Foon Tan)
   - Poll for link up status after retraining the link (Ley Foon Tan)

  Axis ARTPEC-6 host bridge driver:
   - Add PCI_MSI_IRQ_DOMAIN dependency (Arnd Bergmann)
   - Add DT binding for Axis ARTPEC-6 PCIe controller (Niklas Cassel)
   - Add Axis ARTPEC-6 PCIe controller driver (Niklas Cassel)

  Intel VMD host bridge driver:
   - Use lock save/restore in interrupt enable path (Jon Derrick)
   - Select device dma ops to override (Keith Busch)
   - Initialize list item in IRQ disable (Keith Busch)
   - Use x86_vector_domain as parent domain (Keith Busch)
   - Separate MSI and MSI-X vector sharing (Keith Busch)

  Marvell Aardvark host bridge driver:
   - Add DT binding for the Aardvark PCIe controller (Thomas Petazzoni)
   - Add Aardvark PCI host controller driver (Thomas Petazzoni)
   - Add Aardvark PCIe support for Armada 3700 (Thomas Petazzoni)

  Microsoft Hyper-V host bridge driver:
   - Fix interrupt cleanup path (Cathy Avery)
   - Don't leak buffer in hv_pci_onchannelcallback() (Vitaly Kuznetsov)
   - Handle all pending messages in hv_pci_onchannelcallback() (Vitaly Kuznetsov)

  NVIDIA Tegra host bridge driver:
   - Program PADS_REFCLK_CFG* always, not just on legacy SoCs (Stephen Warren)
   - Program PADS_REFCLK_CFG* registers with per-SoC values (Stephen Warren)
   - Use lower-case hex consistently for register definitions (Thierry Reding)
   - Use generic pci_remap_iospace() rather than ARM32-specific one (Thierry Reding)
   - Stop setting pcibios_min_mem (Thierry Reding)

  Renesas R-Car host bridge driver:
   - Drop gen2 dummy I/O port region (Bjorn Helgaas)

  TI DRA7xx host bridge driver:
   - Fix return value in case of error (Christophe JAILLET)

  Xilinx AXI host bridge driver:
   - Fix return value in case of error (Christophe JAILLET)

  Miscellaneous:
   - Make bus_attr_resource_alignment static (Ben Dooks)
   - Include <asm/dma.h> for isa_dma_bridge_buggy (Ben Dooks)
   - MAINTAINERS: Add file patterns for PCI device tree bindings (Geert Uytterhoeven)
   - Make host bridge drivers explicitly non-modular (Paul Gortmaker)"

* tag 'pci-v4.8-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (125 commits)
  PCI: xgene: Make explicitly non-modular
  PCI: thunder-pem: Make explicitly non-modular
  PCI: thunder-ecam: Make explicitly non-modular
  PCI: tegra: Make explicitly non-modular
  PCI: rcar-gen2: Make explicitly non-modular
  PCI: rcar: Make explicitly non-modular
  PCI: mvebu: Make explicitly non-modular
  PCI: layerscape: Make explicitly non-modular
  PCI: keystone: Make explicitly non-modular
  PCI: hisi: Make explicitly non-modular
  PCI: generic: Make explicitly non-modular
  PCI: designware-plat: Make it explicitly non-modular
  PCI: artpec6: Make explicitly non-modular
  PCI: armada8k: Make explicitly non-modular
  PCI: artpec: Add PCI_MSI_IRQ_DOMAIN dependency
  PCI: Add ACS quirk for Solarflare SFC9220
  arm64: dts: marvell: Add Aardvark PCIe support for Armada 3700
  PCI: aardvark: Add Aardvark PCI host controller driver
  dt-bindings: add DT binding for the Aardvark PCIe controller
  PCI: tegra: Program PADS_REFCLK_CFG* registers with per-SoC values
  ...
2016-08-02 17:12:29 -04:00
Bjorn Helgaas
9454c23852 Merge branch 'pci/msi-affinity' into next
Conflicts:
	drivers/nvme/host/pci.c
2016-08-01 12:34:01 -05:00
Bjorn Helgaas
a04bee8285 Merge branches 'pci/host-aardvark', 'pci/host-altera', 'pci/host-dra7xx', 'pci/host-hv', 'pci/host-vmd' and 'pci/host-xilinx' into next
* pci/host-aardvark:
  arm64: dts: marvell: Add Aardvark PCIe support for Armada 3700
  PCI: aardvark: Add Aardvark PCI host controller driver
  dt-bindings: add DT binding for the Aardvark PCIe controller

* pci/host-altera:
  PCI: altera: Poll for link up status after retraining the link
  PCI: altera: Check link status before retrain link
  PCI: altera: Reorder read/write functions

* pci/host-dra7xx:
  PCI: dra7xx: Fix return value in case of error

* pci/host-hv:
  PCI: hv: Fix interrupt cleanup path
  PCI: hv: Handle all pending messages in hv_pci_onchannelcallback()
  PCI: hv: Don't leak buffer in hv_pci_onchannelcallback()

* pci/host-vmd:
  x86/PCI: VMD: Separate MSI and MSI-X vector sharing
  x86/PCI: VMD: Use x86_vector_domain as parent domain
  x86/PCI: VMD: Use lock save/restore in interrupt enable path
  x86/PCI: VMD: Initialize list item in IRQ disable
  x86/PCI: VMD: Select device dma ops to override

* pci/host-xilinx:
  PCI: xilinx: Fix return value in case of error

Manually apply changes from pci/demodularize-hosts and
pci/host-request-windows to drivers/pci/host/pci-aardvark.c
2016-08-01 12:32:13 -05:00
Bjorn Helgaas
ea1f4e9d1d Merge branch 'pci/host-tegra' into next
* pci/host-tegra:
  PCI: tegra: Program PADS_REFCLK_CFG* registers with per-SoC values
  PCI: tegra: Program PADS_REFCLK_CFG* always, not just on legacy SoCs
  PCI: tegra: Stop setting pcibios_min_mem
  PCI: tegra: Use generic pci_remap_iospace() rather than ARM32-specific one
  PCI: tegra: Use lower-case hex consistently for register definitions

Conflicts:
	drivers/pci/host/pci-tegra.c

Drop stray pci_ioremap_io() per Thierry Reding <treding@nvidia.com>;
removal tested by Jon Hunter <jonathanh@nvidia.com>.
2016-08-01 12:25:37 -05:00
Bjorn Helgaas
79dd993461 Merge branches 'pci/demodularize-hosts' and 'pci/host-request-windows' into next
* pci/demodularize-hosts:
  PCI: xgene: Make explicitly non-modular
  PCI: thunder-pem: Make explicitly non-modular
  PCI: thunder-ecam: Make explicitly non-modular
  PCI: tegra: Make explicitly non-modular
  PCI: rcar-gen2: Make explicitly non-modular
  PCI: rcar: Make explicitly non-modular
  PCI: mvebu: Make explicitly non-modular
  PCI: layerscape: Make explicitly non-modular
  PCI: keystone: Make explicitly non-modular
  PCI: hisi: Make explicitly non-modular
  PCI: generic: Make explicitly non-modular
  PCI: designware-plat: Make it explicitly non-modular
  PCI: artpec6: Make explicitly non-modular
  PCI: armada8k: Make explicitly non-modular
  PCI: artpec: Add PCI_MSI_IRQ_DOMAIN dependency
  PCI: artpec: Add Axis ARTPEC-6 PCIe controller driver
  PCI: Add DT binding for Axis ARTPEC-6 PCIe controller
  PCI: generic: Select IRQ_DOMAIN

* pci/host-request-windows:
  PCI: versatile: Simplify host bridge window iteration
  PCI: versatile: Request host bridge window resources with core function
  PCI: tegra: Request host bridge window resources with core function
  PCI: tegra: Remove top-level resource from hierarchy
  PCI: rcar: Simplify host bridge window iteration
  PCI: rcar: Request host bridge window resources with core function
  PCI: rcar Gen2: Request host bridge window resources
  PCI: rcar: Drop gen2 dummy I/O port region
  ARM: Make PCI I/O space optional
  PCI: mvebu: Request host bridge window resources with core function
  PCI: generic: Simplify host bridge window iteration
  PCI: generic: Request host bridge window resources with core function
  PCI: altera: Simplify host bridge window iteration
  PCI: altera: Request host bridge window resources with core function
  PCI: xilinx-nwl: Use dev_printk() when possible
  PCI: xilinx-nwl: Request host bridge window resources
  PCI: xilinx-nwl: Free bridge resource list on failure
  PCI: xilinx: Request host bridge window resources
  PCI: xilinx: Free bridge resource list on failure
  PCI: xgene: Request host bridge window resources
  PCI: xgene: Free bridge resource list on failure
  PCI: iproc: Request host bridge window resources
  PCI: designware: Simplify host bridge window iteration
  PCI: designware: Request host bridge window resources
  PCI: designware: Free bridge resource list on failure
  PCI: Add devm_request_pci_bus_resources()
2016-08-01 12:23:57 -05:00
Bjorn Helgaas
3efc702378 Merge branch 'pci/resource' into next
* pci/resource:
  unicore32/PCI: Remove pci=firmware command line parameter handling
  ARM/PCI: Remove arch-specific pcibios_enable_device()
  ARM64/PCI: Remove arch-specific pcibios_enable_device()
  MIPS/PCI: Claim bus resources on PCI_PROBE_ONLY set-ups
  ARM/PCI: Claim bus resources on PCI_PROBE_ONLY set-ups
  PCI: generic: Claim bus resources on PCI_PROBE_ONLY set-ups
  PCI: Add generic pci_bus_claim_resources()
  alx: Use pci_(request|release)_mem_regions
  ethernet/intel: Use pci_(request|release)_mem_regions
  GenWQE: Use pci_(request|release)_mem_regions
  lpfc: Use pci_(request|release)_mem_regions
  NVMe: Use pci_(request|release)_mem_regions
  PCI: Add helpers to request/release memory and I/O regions
  PCI: Extending pci=resource_alignment to specify device/vendor IDs
  sparc/PCI: Implement pci_resource_to_user() with pcibios_resource_to_bus()
  powerpc/pci: Implement pci_resource_to_user() with pcibios_resource_to_bus()
  microblaze/PCI: Implement pci_resource_to_user() with pcibios_resource_to_bus()
  PCI: Unify pci_resource_to_user() declarations
  microblaze/PCI: Remove useless __pci_mmap_set_pgprot()
  powerpc/pci: Remove __pci_mmap_set_pgprot()
  PCI: Ignore write combining when mapping I/O port space
2016-08-01 12:23:44 -05:00
Bjorn Helgaas
a00c74c166 Merge branches 'pci/aspm', 'pci/dpc', 'pci/hotplug', 'pci/misc', 'pci/msi', 'pci/pm' and 'pci/virtualization' into next
* pci/aspm:
  PCI/ASPM: Remove redundant check of pcie_set_clkpm

* pci/dpc:
  PCI: Remove DPC tristate module option
  PCI: Bind DPC to Root Ports as well as Downstream Ports
  PCI: Fix whitespace in struct dpc_dev
  PCI: Convert Downstream Port Containment driver to use devm_* functions

* pci/hotplug:
  PCI: Allow additional bus numbers for hotplug bridges

* pci/misc:
  PCI: Include <asm/dma.h> for isa_dma_bridge_buggy
  PCI: Make bus_attr_resource_alignment static
  MAINTAINERS: Add file patterns for PCI device tree bindings
  PCI: Fix comment typo

* pci/msi:
  PCI/MSI: irqchip: Fix PCI_MSI dependencies

* pci/pm:
  PCI: pciehp: Ignore interrupts during D3cold
  PCI: Document connection between pci_power_t and hardware PM capability
  PCI: Add runtime PM support for PCIe ports
  ACPI / hotplug / PCI: Runtime resume bridge before rescan
  PCI: Power on bridges before scanning new devices
  PCI: Put PCIe ports into D3 during suspend
  PCI: Don't clear d3cold_allowed for PCIe ports
  PCI / PM: Enforce type casting for pci_power_t

* pci/virtualization:
  PCI: Add ACS quirk for Solarflare SFC9220
  PCI: Add DMA alias quirk for Adaptec 3805
  PCI: Mark Atheros AR9485 and QCA9882 to avoid bus reset
  PCI: Add function 1 DMA alias quirk for Marvell 88SE9182
2016-08-01 12:23:31 -05:00
Paul Gortmaker
50dcd29096 PCI: xgene: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCI_XGENE
  drivers/pci/host/Kconfig:       bool "X-Gene PCIe controller"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Replace module_platform_driver() with builtin_platform_driver(), which uses
the same init level priority, so init ordering is unchanged.

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Tanmay Inamdar <tinamdar@apm.com>
2016-08-01 12:22:51 -05:00
Paul Gortmaker
0b3cd16437 PCI: thunder-pem: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCI_HOST_THUNDER_PEM
  drivers/pci/host/Kconfig:       bool "Cavium Thunder PCIe controller to off-chip devices"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Replace module_platform_driver() with builtin_platform_driver(), which uses
the same init level priority, so init ordering is unchanged.

Note that MODULE_DEVICE_TABLE is a no-op for non-modular code.

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: David Daney <david.daney@cavium.com>
2016-08-01 12:22:51 -05:00
Paul Gortmaker
d0c6fd76da PCI: thunder-ecam: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCI_HOST_THUNDER_ECAM
  drivers/pci/host/Kconfig:       bool "Cavium Thunder ECAM controller to on-chip devices on pass-1.x silicon"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Replace module_platform_driver() with builtin_platform_driver(), which uses
the same init level priority, so init ordering is unchanged.

Note that MODULE_DEVICE_TABLE is a no-op for non-modular code.

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: David Daney <david.daney@cavium.com>
2016-08-01 12:22:51 -05:00
Paul Gortmaker
ad18327156 PCI: tegra: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCI_TEGRA
  drivers/pci/host/Kconfig:       bool "NVIDIA Tegra PCIe controller"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Replace module_platform_driver() with builtin_platform_driver(), which uses
the same init level priority, so init ordering is unchanged.

Note that MODULE_DEVICE_TABLE is a no-op for non-modular code.

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Thierry Reding <thierry.reding@gmail.com>
CC: Stephen Warren <swarren@wwwdotorg.org>
CC: Alexandre Courbot <gnurou@gmail.com>
CC: linux-tegra@vger.kernel.org
2016-08-01 12:22:51 -05:00
Paul Gortmaker
0b9c158925 PCI: rcar-gen2: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCI_RCAR_GEN2
  drivers/pci/host/Kconfig:       bool "Renesas R-Car Gen2 Internal PCI controller"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Replace module_platform_driver() with builtin_platform_driver(), which uses
the same init level priority, so init ordering is unchanged.

Note that MODULE_DEVICE_TABLE is a no-op for non-modular code.

[bhelgaas: changelog, remove "Module" from author comment]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Phil Edworthy <phil.edworthy@renesas.com>
CC: Valentine Barshak <valentine.barshak@cogentembedded.com>
2016-08-01 12:22:51 -05:00
Paul Gortmaker
42d1071984 PCI: rcar: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCI_RCAR_GEN2_PCIE
  drivers/pci/host/Kconfig:       bool "Renesas R-Car PCIe controller"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Replace module_platform_driver() with builtin_platform_driver(), which uses
the same init level priority, so init ordering is unchanged.

Note that MODULE_DEVICE_TABLE is a no-op for non-modular code.

[bhelgaas: changelog, remove "Module" from author comment]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Phil Edworthy <phil.edworthy@renesas.com>
2016-08-01 12:22:51 -05:00
Paul Gortmaker
82641d9b18 PCI: mvebu: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCI_MVEBU
  drivers/pci/host/Kconfig:       bool "Marvell EBU PCIe controller"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Replace module_platform_driver() with builtin_platform_driver(), which uses
the same init level priority, so init ordering is unchanged.

Note that MODULE_DEVICE_TABLE is a no-op for non-modular code.

[bhelgaas: changelog, remove "Module" from author comment]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
CC: Jason Cooper <jason@lakedaemon.net>
2016-08-01 12:22:51 -05:00
Paul Gortmaker
154fb60038 PCI: layerscape: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCI_LAYERSCAPE
  drivers/pci/host/Kconfig:       bool "Freescale Layerscape PCIe controller"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Replace module_platform_driver() with builtin_platform_driver(), which uses
the same init level priority, so init ordering is unchanged.

Note that MODULE_DEVICE_TABLE is a no-op for non-modular code.

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Minghuan Lian <minghuan.Lian@freescale.com>
CC: Mingkai Hu <mingkai.hu@freescale.com>
CC: Roy Zang <tie-fei.zang@freescale.com>
2016-08-01 12:22:50 -05:00
Paul Gortmaker
1481bf211f PCI: keystone: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCI_KEYSTONE
  drivers/pci/host/Kconfig:       bool "TI Keystone PCIe controller"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Replace module_platform_driver() with builtin_platform_driver(), which uses
the same init level priority, so init ordering is unchanged.

Note that MODULE_DEVICE_TABLE is a no-op for non-modular code.

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-By: Murali Karicheri <m-karicheri2@ti.com>
2016-08-01 12:22:50 -05:00
Paul Gortmaker
fb38118dfe PCI: hisi: Make explicitly non-modular
This code is not being built as a module by anyone:

  host/Kconfig:config PCI_HISI
  host/Kconfig:    bool "HiSilicon Hip05 and Hip06 SoCs PCIe controllers"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Replace module_platform_driver() with builtin_platform_driver(), which uses
the same init level priority, so init ordering is unchanged.

Note that MODULE_DEVICE_TABLE is a no-op for non-modular code.

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Zhou Wang <wangzhou1@hisilicon.com>
CC: Dacai Zhu <zhudacai@hisilicon.com>
CC: Gabriele Paoloni <gabriele.paoloni@huawei.com>
2016-08-01 12:22:50 -05:00
Paul Gortmaker
99849bf39b PCI: generic: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCI_HOST_GENERIC
  drivers/pci/host/Kconfig:       bool "Generic PCI host controller"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Replace module_platform_driver() with builtin_platform_driver(), which uses
the same init level priority, so init ordering is unchanged.

Note that MODULE_DEVICE_TABLE is a no-op for non-modular code.

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Will Deacon <will.deacon@arm.com>
2016-08-01 12:22:50 -05:00
Paul Gortmaker
ca8d3346c8 PCI: designware-plat: Make it explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCIE_DW_PLAT
  drivers/pci/host/Kconfig:       bool "Platform bus based DesignWare PCIe Controller"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Replace module_platform_driver() with builtin_platform_driver(), which uses
the same init level priority, so init ordering is unchanged.

Note that MODULE_DEVICE_TABLE is a no-op for non-modular code.

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Joao Pinto <jpinto@synopsys.com>
CC: Jingoo Han <jingoohan1@gmail.com>
CC: Pratyush Anand <pratyush.anand@gmail.com>
2016-08-01 12:22:50 -05:00
Paul Gortmaker
58bdaa1d38 PCI: artpec6: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCIE_ARTPEC6
  drivers/pci/host/Kconfig:       bool "Axis ARTPEC-6 PCIe controller"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Replace module_platform_driver() with builtin_platform_driver(), which uses
the same init level priority, so init ordering is unchanged.

Note that MODULE_DEVICE_TABLE is a no-op for non-modular code.

[bhelgaas: changelog, add "Author" comment]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Niklas Cassel <niklas.cassel@axis.com>
CC: Jesper Nilsson <jesper.nilsson@axis.com>
2016-08-01 12:22:50 -05:00
Paul Gortmaker
0e6f98cb62 PCI: armada8k: Make explicitly non-modular
This code is not being built as a module by anyone:

  drivers/pci/host/Kconfig:config PCIE_ARMADA_8K
  drivers/pci/host/Kconfig:       bool "Marvell Armada-8K PCIe controller"

Remove uses of MODULE_DESCRIPTION(), MODULE_AUTHOR(), MODULE_LICENSE(),
etc., so that when reading the driver there is no doubt it is builtin-only.
The information is preserved in comments at the top of the file.

Replace module_platform_driver() with builtin_platform_driver(), which uses
the same init level priority, so init ordering is unchanged.

Note that MODULE_DEVICE_TABLE is a no-op for non-modular code.

[bhelgaas: changelog]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2016-08-01 12:22:50 -05:00
Bjorn Helgaas
499e858e31 Merge branches 'pci/host-artpec' and 'pci/host-generic' into pci/demodularize-hosts
* pci/host-artpec:
  PCI: artpec: Add PCI_MSI_IRQ_DOMAIN dependency
  PCI: artpec: Add Axis ARTPEC-6 PCIe controller driver
  PCI: Add DT binding for Axis ARTPEC-6 PCIe controller

* pci/host-generic:
  PCI: generic: Select IRQ_DOMAIN
2016-08-01 12:22:43 -05:00
Linus Torvalds
bad60e6f25 powerpc updates for 4.8 # 1
Highlights:
  - PowerNV PCI hotplug support.
  - Lots more Power9 support.
  - eBPF JIT support on ppc64le.
  - Lots of cxl updates.
  - Boot code consolidation.
 
 Bug fixes:
  - Fix spin_unlock_wait() from Boqun Feng
  - Fix stack pointer corruption in __tm_recheckpoint() from Michael Neuling
  - Fix multiple bugs in memory_hotplug_max() from Bharata B Rao
  - mm: Ensure "special" zones are empty from Oliver O'Halloran
  - ftrace: Separate the heuristics for checking call sites from Michael Ellerman
  - modules: Never restore r2 for a mprofile-kernel style mcount() call from Michael Ellerman
  - Fix endianness when reading TCEs from Alexey Kardashevskiy
  - start rtasd before PCI probing from Greg Kurz
  - PCI: rpaphp: Fix slot registration for multiple slots under a PHB from Tyrel Datwyler
  - powerpc/mm: Add memory barrier in __hugepte_alloc() from Sukadev Bhattiprolu
 
 Cleanups & fixes:
  - Drop support for MPIC in pseries from Rashmica Gupta
  - Define and use PPC64_ELF_ABI_v2/v1 from Michael Ellerman
  - Remove unused symbols in asm-offsets.c from Rashmica Gupta
  - Fix SRIOV not building without EEH enabled from Russell Currey
  - Remove kretprobe_trampoline_holder. from Thiago Jung Bauermann
  - Reduce log level of PCI I/O space warning from Benjamin Herrenschmidt
  - Add array bounds checking to crash_shutdown_handlers from Suraj Jitindar Singh
  - Avoid -maltivec when using clang integrated assembler from Anton Blanchard
  - Fix array overrun in ppc_rtas() syscall from Andrew Donnellan
  - Fix error return value in cmm_mem_going_offline() from Rasmus Villemoes
  - export cpu_to_core_id() from Mauricio Faria de Oliveira
  - Remove old symbols from defconfigs from Andrew Donnellan
  - Update obsolete comments in setup_32.c about entry conditions from Benjamin Herrenschmidt
  - Add comment explaining the purpose of setup_kdump_trampoline() from Benjamin Herrenschmidt
  - Merge the RELOCATABLE config entries for ppc32 and ppc64 from Kevin Hao
  - Remove RELOCATABLE_PPC32 from Kevin Hao
  - Fix .long's in tlb-radix.c to more meaningful from Balbir Singh
 
 Minor cleanups & fixes:
  - Andrew Donnellan, Anna-Maria Gleixner, Anton Blanchard, Benjamin
    Herrenschmidt, Bharata B Rao, Christophe Leroy, Colin Ian King, Geliang
    Tang, Greg Kurz, Madhavan Srinivasan, Michael Ellerman, Michael Ellerman,
    Stephen Rothwell, Stewart Smith.
 
 Freescale updates from Scott:
  - "Highlights include more 8xx optimizations, device tree updates,
    and MVME7100 support."
 
 PowerNV PCI hotplug from Gavin Shan:
  - PCI: Add pcibios_setup_bridge()
  - Override pcibios_setup_bridge()
  - Remove PCI_RESET_DELAY_US
  - Move pnv_pci_ioda_setup_opal_tce_kill() around
  - Increase PE# capacity
  - Allocate PE# in reverse order
  - Create PEs in pcibios_setup_bridge()
  - Setup PE for root bus
  - Extend PCI bridge resources
  - Make pnv_ioda_deconfigure_pe() visible
  - Dynamically release PE
  - Update bridge windows on PCI plug
  - Delay populating pdn
  - Support PCI slot ID
  - Use PCI slot reset infrastructure
  - Introduce pnv_pci_get_slot_id()
  - Functions to get/set PCI slot state
  - PCI/hotplug: PowerPC PowerNV PCI hotplug driver
  - Print correct PHB type names
 
 Power9 idle support from Shreyas B. Prabhu:
  - set power_save func after the idle states are initialized
  - Use PNV_THREAD_WINKLE macro while requesting for winkle
  - make hypervisor state restore a function
  - Rename idle_power7.S to idle_book3s.S
  - Rename reusable idle functions to hardware agnostic names
  - Make pnv_powersave_common more generic
  - abstraction for saving SPRs before entering deep idle states
  - Add platform support for stop instruction
  - cpuidle/powernv: Use CPUIDLE_STATE_MAX instead of MAX_POWERNV_IDLE_STATES
  - cpuidle/powernv: cleanup cpuidle-powernv.c
  - cpuidle/powernv: Add support for POWER ISA v3 idle states
  - Use deepest stop state when cpu is offlined
 
 Power9 PMU from Madhavan Srinivasan:
  - factor out power8 pmu macros and defines
  - factor out power8 pmu functions
  - factor out power8 __init_pmu code
  - Add power9 event list macros for generic and cache events
  - Power9 PMU support
  - Export Power9 generic and cache events to sysfs
 
 Power9 preliminary interrupt & PCI support from Benjamin Herrenschmidt:
  - Add XICS emulation APIs
  - Move a few exception common handlers to make room
  - Add support for HV virtualization interrupts
  - Add mechanism to force a replay of interrupts
  - Add ICP OPAL backend
  - Discover IODA3 PHBs
  - pci: Remove obsolete SW invalidate
  - opal: Add real mode call wrappers
  - Rename TCE invalidation calls
  - Remove SWINV constants and obsolete TCE code
  - Rework accessing the TCE invalidate register
  - Fallback to OPAL for TCE invalidations
  - Use the device-tree to get available range of M64's
  - Check status of a PHB before using it
  - pci: Don't try to allocate resources that will be reassigned
 
 Other Power9:
  - Send SIGBUS on unaligned copy and paste from Chris Smart
  - Large Decrementer support from Oliver O'Halloran
  - Load Monitor Register Support from Jack Miller
 
 Performance improvements from Anton Blanchard:
  - Avoid load hit store in __giveup_fpu() and __giveup_altivec()
  - Avoid load hit store in setup_sigcontext()
  - Remove assembly versions of strcpy, strcat, strlen and strcmp
  - Align hot loops of some string functions
 
 eBPF JIT from Naveen N. Rao:
  - Fix/enhance 32-bit Load Immediate implementation
  - Optimize 64-bit Immediate loads
  - Introduce rotate immediate instructions
  - A few cleanups
  - Isolate classic BPF JIT specifics into a separate header
  - Implement JIT compiler for extended BPF
 
 Operator Panel driver from Suraj Jitindar Singh:
  - devicetree/bindings: Add binding for operator panel on FSP machines
  - Add inline function to get rc from an ASYNC_COMP opal_msg
  - Add driver for operator panel on FSP machines
 
 Sparse fixes from Daniel Axtens:
  - make some things static
  - Introduce asm-prototypes.h
  - Include headers containing prototypes
  - Use #ifdef __BIG_ENDIAN__ #else for REG_BYTE
  - kvm: Clarify __user annotations
  - Pass endianness to sparse
  - Make ppc_md.{halt, restart} __noreturn
 
 MM fixes & cleanups from Aneesh Kumar K.V:
  - radix: Update LPCR HR bit as per ISA
  - use _raw variant of page table accessors
  - Compile out radix related functions if RADIX_MMU is disabled
  - Clear top 16 bits of va only on older cpus
  - Print formation regarding the the MMU mode
  - hash: Update SDR1 size encoding as documented in ISA 3.0
  - radix: Update PID switch sequence
  - radix: Update machine call back to support new HCALL.
  - radix: Add LPID based tlb flush helpers
  - radix: Add a kernel command line to disable radix
  - Cleanup LPCR defines
 
 Boot code consolidation from Benjamin Herrenschmidt:
  - Move epapr_paravirt_early_init() to early_init_devtree()
  - cell: Don't use flat device-tree after boot
  - ge_imp3a: Don't use the flat device-tree after boot
  - mpc85xx_ds: Don't use the flat device-tree after boot
  - mpc85xx_rdb: Don't use the flat device-tree after boot
  - Don't test for machine type in rtas_initialize()
  - Don't test for machine type in smp_setup_cpu_maps()
  - dt: Add of_device_compatible_match()
  - Factor do_feature_fixup calls
  - Move 64-bit feature fixup earlier
  - Move 64-bit memory reserves to setup_arch()
  - Use a cachable DART
  - Move FW feature probing out of pseries probe()
  - Put exception configuration in a common place
  - Remove early allocation of the SMU command buffer
  - Move MMU backend selection out of platform code
  - pasemi: Remove IOBMAP allocation from platform probe()
  - mm/hash: Don't use machine_is() early during boot
  - Don't test for machine type to detect HEA special case
  - pmac: Remove spurrious machine type test
  - Move hash table ops to a separate structure
  - Ensure that ppc_md is empty before probing for machine type
  - Move 64-bit probe_machine() to later in the boot process
  - Move 32-bit probe() machine to later in the boot process
  - Get rid of ppc_md.init_early()
  - Move the boot time info banner to a separate function
  - Move setting of {i,d}cache_bsize to initialize_cache_info()
  - Move the content of setup_system() to setup_arch()
  - Move cache info inits to a separate function
  - Re-order the call to smp_setup_cpu_maps()
  - Re-order setup_panic()
  - Make a few boot functions __init
  - Merge 32-bit and 64-bit setup_arch()
 
 Other new features:
  - tty/hvc: Use IRQF_SHARED for OPAL hvc consoles from Sam Mendoza-Jonas
  - tty/hvc: Use opal irqchip interface if available from Sam Mendoza-Jonas
  - powerpc: Add module autoloading based on CPU features from Alastair D'Silva
  - crypto: vmx - Convert to CPU feature based module autoloading from Alastair D'Silva
  - Wake up kopald polling thread before waiting for events from Benjamin Herrenschmidt
  - xmon: Dump ISA 2.06 SPRs from Michael Ellerman
  - xmon: Dump ISA 2.07 SPRs from Michael Ellerman
  - Add a parameter to disable 1TB segs from Oliver O'Halloran
  - powerpc/boot: Add OPAL console to epapr wrappers from Oliver O'Halloran
  - Assign fixed PHB number based on device-tree properties from Guilherme G. Piccoli
  - pseries: Add pseries hotplug workqueue from John Allen
  - pseries: Add support for hotplug interrupt source from John Allen
  - pseries: Use kernel hotplug queue for PowerVM hotplug events from John Allen
  - pseries: Move property cloning into its own routine from Nathan Fontenot
  - pseries: Dynamic add entires to associativity lookup array from Nathan Fontenot
  - pseries: Auto-online hotplugged memory from Nathan Fontenot
  - pseries: Remove call to memblock_add() from Nathan Fontenot
 
 cxl:
  - Add set and get private data to context struct from Michael Neuling
  - make base more explicitly non-modular from Paul Gortmaker
  - Use for_each_compatible_node() macro from Wei Yongjun
  - Frederic Barrat
    - Abstract the differences between the PSL and XSL
    - Make vPHB device node match adapter's
  - Philippe Bergheaud
    - Add mechanism for delivering AFU driver specific events
    - Ignore CAPI adapters misplaced in switched slots
    - Refine slice error debug messages
  - Andrew Donnellan
    - static-ify variables to fix sparse warnings
    - PCI/hotplug: pnv_php: export symbols and move struct types needed by cxl
    - PCI/hotplug: pnv_php: handle OPAL_PCI_SLOT_OFFLINE power state
    - Add cxl_check_and_switch_mode() API to switch bi-modal cards
    - remove dead Kconfig options
    - fix potential NULL dereference in free_adapter()
  - Ian Munsie
    - Update process element after allocating interrupts
    - Add support for CAPP DMA mode
    - Fix allowing bogus AFU descriptors with 0 maximum processes
    - Fix allocating a minimum of 2 pages for the SPA
    - Fix bug where AFU disable operation had no effect
    - Workaround XSL bug that does not clear the RA bit after a reset
    - Fix NULL pointer dereference on kernel contexts with no AFU interrupts
    - powerpc/powernv: Split cxl code out into a separate file
    - Add cxl_slot_is_supported API
    - Enable bus mastering for devices using CAPP DMA mode
    - Move cxl_afu_get / cxl_afu_put to base
    - Allow a default context to be associated with an external pci_dev
    - Do not create vPHB if there are no AFU configuration records
    - powerpc/powernv: Add support for the cxl kernel api on the real phb
    - Add support for using the kernel API with a real PHB
    - Add kernel APIs to get & set the max irqs per context
    - Add preliminary workaround for CX4 interrupt limitation
    - Add support for interrupts on the Mellanox CX4
    - Workaround PE=0 hardware limitation in Mellanox CX4
    - powerpc/powernv: Fix pci-cxl.c build when CONFIG_MODULES=n
 
 selftests:
  - Test unaligned copy and paste from Chris Smart
  - Load Monitor Register Tests from Jack Miller
  - Cyril Bur
    - exec() with suspended transaction
    - Use signed long to read perf_event_paranoid
    - Fix usage message in context_switch
    - Fix generation of vector instructions/types in context_switch
  - Michael Ellerman
    - Use "Delta" rather than "Error" in normal output
    - Import Anton's mmap & futex micro benchmarks
    - Add a test for PROT_SAO
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Merge tag 'powerpc-4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:
 "Highlights:
   - PowerNV PCI hotplug support.
   - Lots more Power9 support.
   - eBPF JIT support on ppc64le.
   - Lots of cxl updates.
   - Boot code consolidation.

  Bug fixes:
   - Fix spin_unlock_wait() from Boqun Feng
   - Fix stack pointer corruption in __tm_recheckpoint() from Michael
     Neuling
   - Fix multiple bugs in memory_hotplug_max() from Bharata B Rao
   - mm: Ensure "special" zones are empty from Oliver O'Halloran
   - ftrace: Separate the heuristics for checking call sites from
     Michael Ellerman
   - modules: Never restore r2 for a mprofile-kernel style mcount() call
     from Michael Ellerman
   - Fix endianness when reading TCEs from Alexey Kardashevskiy
   - start rtasd before PCI probing from Greg Kurz
   - PCI: rpaphp: Fix slot registration for multiple slots under a PHB
     from Tyrel Datwyler
   - powerpc/mm: Add memory barrier in __hugepte_alloc() from Sukadev
     Bhattiprolu

  Cleanups & fixes:
   - Drop support for MPIC in pseries from Rashmica Gupta
   - Define and use PPC64_ELF_ABI_v2/v1 from Michael Ellerman
   - Remove unused symbols in asm-offsets.c from Rashmica Gupta
   - Fix SRIOV not building without EEH enabled from Russell Currey
   - Remove kretprobe_trampoline_holder from Thiago Jung Bauermann
   - Reduce log level of PCI I/O space warning from Benjamin
     Herrenschmidt
   - Add array bounds checking to crash_shutdown_handlers from Suraj
     Jitindar Singh
   - Avoid -maltivec when using clang integrated assembler from Anton
     Blanchard
   - Fix array overrun in ppc_rtas() syscall from Andrew Donnellan
   - Fix error return value in cmm_mem_going_offline() from Rasmus
     Villemoes
   - export cpu_to_core_id() from Mauricio Faria de Oliveira
   - Remove old symbols from defconfigs from Andrew Donnellan
   - Update obsolete comments in setup_32.c about entry conditions from
     Benjamin Herrenschmidt
   - Add comment explaining the purpose of setup_kdump_trampoline() from
     Benjamin Herrenschmidt
   - Merge the RELOCATABLE config entries for ppc32 and ppc64 from Kevin
     Hao
   - Remove RELOCATABLE_PPC32 from Kevin Hao
   - Fix .long's in tlb-radix.c to more meaningful from Balbir Singh

  Minor cleanups & fixes:
   - Andrew Donnellan, Anna-Maria Gleixner, Anton Blanchard, Benjamin
     Herrenschmidt, Bharata B Rao, Christophe Leroy, Colin Ian King,
     Geliang Tang, Greg Kurz, Madhavan Srinivasan, Michael Ellerman,
     Michael Ellerman, Stephen Rothwell, Stewart Smith.

  Freescale updates from Scott:
   - "Highlights include more 8xx optimizations, device tree updates,
     and MVME7100 support."

  PowerNV PCI hotplug from Gavin Shan:
   - PCI: Add pcibios_setup_bridge()
   - Override pcibios_setup_bridge()
   - Remove PCI_RESET_DELAY_US
   - Move pnv_pci_ioda_setup_opal_tce_kill() around
   - Increase PE# capacity
   - Allocate PE# in reverse order
   - Create PEs in pcibios_setup_bridge()
   - Setup PE for root bus
   - Extend PCI bridge resources
   - Make pnv_ioda_deconfigure_pe() visible
   - Dynamically release PE
   - Update bridge windows on PCI plug
   - Delay populating pdn
   - Support PCI slot ID
   - Use PCI slot reset infrastructure
   - Introduce pnv_pci_get_slot_id()
   - Functions to get/set PCI slot state
   - PCI/hotplug: PowerPC PowerNV PCI hotplug driver
   - Print correct PHB type names

  Power9 idle support from Shreyas B. Prabhu:
   - set power_save func after the idle states are initialized
   - Use PNV_THREAD_WINKLE macro while requesting for winkle
   - make hypervisor state restore a function
   - Rename idle_power7.S to idle_book3s.S
   - Rename reusable idle functions to hardware agnostic names
   - Make pnv_powersave_common more generic
   - abstraction for saving SPRs before entering deep idle states
   - Add platform support for stop instruction
   - cpuidle/powernv: Use CPUIDLE_STATE_MAX instead of MAX_POWERNV_IDLE_STATES
   - cpuidle/powernv: cleanup cpuidle-powernv.c
   - cpuidle/powernv: Add support for POWER ISA v3 idle states
   - Use deepest stop state when cpu is offlined

  Power9 PMU from Madhavan Srinivasan:
   - factor out power8 pmu macros and defines
   - factor out power8 pmu functions
   - factor out power8 __init_pmu code
   - Add power9 event list macros for generic and cache events
   - Power9 PMU support
   - Export Power9 generic and cache events to sysfs

  Power9 preliminary interrupt & PCI support from Benjamin Herrenschmidt:
   - Add XICS emulation APIs
   - Move a few exception common handlers to make room
   - Add support for HV virtualization interrupts
   - Add mechanism to force a replay of interrupts
   - Add ICP OPAL backend
   - Discover IODA3 PHBs
   - pci: Remove obsolete SW invalidate
   - opal: Add real mode call wrappers
   - Rename TCE invalidation calls
   - Remove SWINV constants and obsolete TCE code
   - Rework accessing the TCE invalidate register
   - Fallback to OPAL for TCE invalidations
   - Use the device-tree to get available range of M64's
   - Check status of a PHB before using it
   - pci: Don't try to allocate resources that will be reassigned

  Other Power9:
   - Send SIGBUS on unaligned copy and paste from Chris Smart
   - Large Decrementer support from Oliver O'Halloran
   - Load Monitor Register Support from Jack Miller

  Performance improvements from Anton Blanchard:
   - Avoid load hit store in __giveup_fpu() and __giveup_altivec()
   - Avoid load hit store in setup_sigcontext()
   - Remove assembly versions of strcpy, strcat, strlen and strcmp
   - Align hot loops of some string functions

  eBPF JIT from Naveen N. Rao:
   - Fix/enhance 32-bit Load Immediate implementation
   - Optimize 64-bit Immediate loads
   - Introduce rotate immediate instructions
   - A few cleanups
   - Isolate classic BPF JIT specifics into a separate header
   - Implement JIT compiler for extended BPF

  Operator Panel driver from Suraj Jitindar Singh:
   - devicetree/bindings: Add binding for operator panel on FSP machines
   - Add inline function to get rc from an ASYNC_COMP opal_msg
   - Add driver for operator panel on FSP machines

  Sparse fixes from Daniel Axtens:
   - make some things static
   - Introduce asm-prototypes.h
   - Include headers containing prototypes
   - Use #ifdef __BIG_ENDIAN__ #else for REG_BYTE
   - kvm: Clarify __user annotations
   - Pass endianness to sparse
   - Make ppc_md.{halt, restart} __noreturn

  MM fixes & cleanups from Aneesh Kumar K.V:
   - radix: Update LPCR HR bit as per ISA
   - use _raw variant of page table accessors
   - Compile out radix related functions if RADIX_MMU is disabled
   - Clear top 16 bits of va only on older cpus
   - Print formation regarding the the MMU mode
   - hash: Update SDR1 size encoding as documented in ISA 3.0
   - radix: Update PID switch sequence
   - radix: Update machine call back to support new HCALL.
   - radix: Add LPID based tlb flush helpers
   - radix: Add a kernel command line to disable radix
   - Cleanup LPCR defines

  Boot code consolidation from Benjamin Herrenschmidt:
   - Move epapr_paravirt_early_init() to early_init_devtree()
   - cell: Don't use flat device-tree after boot
   - ge_imp3a: Don't use the flat device-tree after boot
   - mpc85xx_ds: Don't use the flat device-tree after boot
   - mpc85xx_rdb: Don't use the flat device-tree after boot
   - Don't test for machine type in rtas_initialize()
   - Don't test for machine type in smp_setup_cpu_maps()
   - dt: Add of_device_compatible_match()
   - Factor do_feature_fixup calls
   - Move 64-bit feature fixup earlier
   - Move 64-bit memory reserves to setup_arch()
   - Use a cachable DART
   - Move FW feature probing out of pseries probe()
   - Put exception configuration in a common place
   - Remove early allocation of the SMU command buffer
   - Move MMU backend selection out of platform code
   - pasemi: Remove IOBMAP allocation from platform probe()
   - mm/hash: Don't use machine_is() early during boot
   - Don't test for machine type to detect HEA special case
   - pmac: Remove spurrious machine type test
   - Move hash table ops to a separate structure
   - Ensure that ppc_md is empty before probing for machine type
   - Move 64-bit probe_machine() to later in the boot process
   - Move 32-bit probe() machine to later in the boot process
   - Get rid of ppc_md.init_early()
   - Move the boot time info banner to a separate function
   - Move setting of {i,d}cache_bsize to initialize_cache_info()
   - Move the content of setup_system() to setup_arch()
   - Move cache info inits to a separate function
   - Re-order the call to smp_setup_cpu_maps()
   - Re-order setup_panic()
   - Make a few boot functions __init
   - Merge 32-bit and 64-bit setup_arch()

  Other new features:
   - tty/hvc: Use IRQF_SHARED for OPAL hvc consoles from Sam Mendoza-Jonas
   - tty/hvc: Use opal irqchip interface if available from Sam Mendoza-Jonas
   - powerpc: Add module autoloading based on CPU features from Alastair D'Silva
   - crypto: vmx - Convert to CPU feature based module autoloading from Alastair D'Silva
   - Wake up kopald polling thread before waiting for events from Benjamin Herrenschmidt
   - xmon: Dump ISA 2.06 SPRs from Michael Ellerman
   - xmon: Dump ISA 2.07 SPRs from Michael Ellerman
   - Add a parameter to disable 1TB segs from Oliver O'Halloran
   - powerpc/boot: Add OPAL console to epapr wrappers from Oliver O'Halloran
   - Assign fixed PHB number based on device-tree properties from Guilherme G. Piccoli
   - pseries: Add pseries hotplug workqueue from John Allen
   - pseries: Add support for hotplug interrupt source from John Allen
   - pseries: Use kernel hotplug queue for PowerVM hotplug events from John Allen
   - pseries: Move property cloning into its own routine from Nathan Fontenot
   - pseries: Dynamic add entires to associativity lookup array from Nathan Fontenot
   - pseries: Auto-online hotplugged memory from Nathan Fontenot
   - pseries: Remove call to memblock_add() from Nathan Fontenot

  cxl:
   - Add set and get private data to context struct from Michael Neuling
   - make base more explicitly non-modular from Paul Gortmaker
   - Use for_each_compatible_node() macro from Wei Yongjun
   - Frederic Barrat
   - Abstract the differences between the PSL and XSL
   - Make vPHB device node match adapter's
   - Philippe Bergheaud
   - Add mechanism for delivering AFU driver specific events
   - Ignore CAPI adapters misplaced in switched slots
   - Refine slice error debug messages
   - Andrew Donnellan
   - static-ify variables to fix sparse warnings
   - PCI/hotplug: pnv_php: export symbols and move struct types needed by cxl
   - PCI/hotplug: pnv_php: handle OPAL_PCI_SLOT_OFFLINE power state
   - Add cxl_check_and_switch_mode() API to switch bi-modal cards
   - remove dead Kconfig options
   - fix potential NULL dereference in free_adapter()
   - Ian Munsie
   - Update process element after allocating interrupts
   - Add support for CAPP DMA mode
   - Fix allowing bogus AFU descriptors with 0 maximum processes
   - Fix allocating a minimum of 2 pages for the SPA
   - Fix bug where AFU disable operation had no effect
   - Workaround XSL bug that does not clear the RA bit after a reset
   - Fix NULL pointer dereference on kernel contexts with no AFU interrupts
   - powerpc/powernv: Split cxl code out into a separate file
   - Add cxl_slot_is_supported API
   - Enable bus mastering for devices using CAPP DMA mode
   - Move cxl_afu_get / cxl_afu_put to base
   - Allow a default context to be associated with an external pci_dev
   - Do not create vPHB if there are no AFU configuration records
   - powerpc/powernv: Add support for the cxl kernel api on the real phb
   - Add support for using the kernel API with a real PHB
   - Add kernel APIs to get & set the max irqs per context
   - Add preliminary workaround for CX4 interrupt limitation
   - Add support for interrupts on the Mellanox CX4
   - Workaround PE=0 hardware limitation in Mellanox CX4
   - powerpc/powernv: Fix pci-cxl.c build when CONFIG_MODULES=n

  selftests:
   - Test unaligned copy and paste from Chris Smart
   - Load Monitor Register Tests from Jack Miller
   - Cyril Bur
   - exec() with suspended transaction
   - Use signed long to read perf_event_paranoid
   - Fix usage message in context_switch
   - Fix generation of vector instructions/types in context_switch
   - Michael Ellerman
   - Use "Delta" rather than "Error" in normal output
   - Import Anton's mmap & futex micro benchmarks
   - Add a test for PROT_SAO"

* tag 'powerpc-4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (263 commits)
  powerpc/mm: Parenthesise IS_ENABLED() in if condition
  tty/hvc: Use opal irqchip interface if available
  tty/hvc: Use IRQF_SHARED for OPAL hvc consoles
  selftests/powerpc: exec() with suspended transaction
  powerpc: Improve comment explaining why we modify VRSAVE
  powerpc/mm: Drop unused externs for hpte_init_beat[_v3]()
  powerpc/mm: Rename hpte_init_lpar() and move the fallback to a header
  powerpc/mm: Fix build break when PPC_NATIVE=n
  crypto: vmx - Convert to CPU feature based module autoloading
  powerpc: Add module autoloading based on CPU features
  powerpc/powernv/ioda: Fix endianness when reading TCEs
  powerpc/mm: Add memory barrier in __hugepte_alloc()
  powerpc/modules: Never restore r2 for a mprofile-kernel style mcount() call
  powerpc/ftrace: Separate the heuristics for checking call sites
  powerpc: Merge 32-bit and 64-bit setup_arch()
  powerpc/64: Make a few boot functions __init
  powerpc: Re-order setup_panic()
  powerpc: Re-order the call to smp_setup_cpu_maps()
  powerpc/32: Move cache info inits to a separate function
  powerpc/64: Move the content of setup_system() to setup_arch()
  ...
2016-07-30 21:01:36 -07:00
Arnd Bergmann
09e3cded27 PCI: artpec: Add PCI_MSI_IRQ_DOMAIN dependency
The DesignWare PCIe driver requires MSI support, so we get a warning for
the artpec6 glue driver if that is not enabled:

  warning: (PCIE_ARTPEC6) selects PCIE_DW which has unmet direct dependencies (PCI && PCI_MSI_IRQ_DOMAIN)

Add the same dependency that all other such drivers have.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Niklas Cassel <niklas.cassel@axis.com>
2016-07-29 17:33:03 -05:00
Edward Cree
9fad4012db PCI: Add ACS quirk for Solarflare SFC9220
The Solarflare SFC9220 apparently lacks an ACS capability, but does not
perform peer-to-peer between functions.  Add a quirk so we know about this
isolation.

[bhelgaas: changelog]
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-07-29 17:28:24 -05:00
Linus Torvalds
6453dbdda3 Power management material for v4.8-rc1
- Rework the cpufreq governor interface to make it more straightforward
    and modify the conservative governor to avoid using transition
    notifications (Rafael Wysocki).
 
  - Rework the handling of frequency tables by the cpufreq core to make
    it more efficient (Viresh Kumar).
 
  - Modify the schedutil governor to reduce the number of wakeups it
    causes to occur in cases when the CPU frequency doesn't need to be
    changed (Steve Muckle, Viresh Kumar).
 
  - Fix some minor issues and clean up code in the cpufreq core and
    governors (Rafael Wysocki, Viresh Kumar).
 
  - Add Intel Broxton support to the intel_pstate driver (Srinivas
    Pandruvada).
 
  - Fix problems related to the config TDP feature and to the validity
    of the MSR_HWP_INTERRUPT register in intel_pstate (Jan Kiszka,
    Srinivas Pandruvada).
 
  - Make intel_pstate update the cpu_frequency tracepoint even if
    the frequency doesn't change to avoid confusing powertop (Rafael
    Wysocki).
 
  - Clean up the usage of __init/__initdata in intel_pstate, mark some
    of its internal variables as __read_mostly and drop an unused
    structure element from it (Jisheng Zhang, Carsten Emde).
 
  - Clean up the usage of some duplicate MSR symbols in intel_pstate
    and turbostat (Srinivas Pandruvada).
 
  - Update/fix the powernv, s3c24xx and mvebu cpufreq drivers (Akshay
    Adiga, Viresh Kumar, Ben Dooks).
 
  - Fix a regression (introduced during the 4.5 cycle) in the
    pcc-cpufreq driver by reverting the problematic commit (Andreas
    Herrmann).
 
  - Add support for Intel Denverton to intel_idle, clean up Broxton
    support in it and make it explicitly non-modular (Jacob Pan,
    Jan Beulich, Paul Gortmaker).
 
  - Add support for Denverton and Ivy Bridge server to the Intel RAPL
    power capping driver and make it more careful about the handing
    of MSRs that may not be present (Jacob Pan, Xiaolong Wang).
 
  - Fix resume from hibernation on x86-64 by making the CPU offline
    during resume avoid using MONITOR/MWAIT in the "play dead" loop
    which may lead to an inadvertent "revival" of a "dead" CPU and
    a page fault leading to a kernel crash from it (Rafael Wysocki).
 
  - Make memory management during resume from hibernation more
    straightforward (Rafael Wysocki).
 
  - Add debug features that should help to detect problems related
    to hibernation and resume from it (Rafael Wysocki, Chen Yu).
 
  - Clean up hibernation core somewhat (Rafael Wysocki).
 
  - Prevent KASAN from instrumenting the hibernation core which leads
    to large numbers of false-positives from it (James Morse).
 
  - Prevent PM (hibernate and suspend) notifiers from being called
    during the cleanup phase if they have not been called during the
    corresponding preparation phase which is possible if one of the
    other notifiers returns an error at that time (Lianwei Wang).
 
  - Improve suspend-related debug printout in the tasks freezer and
    clean up suspend-related console handling (Roger Lu, Borislav
    Petkov).
 
  - Update the AnalyzeSuspend script in the kernel sources to
    version 4.2 (Todd Brandt).
 
  - Modify the generic power domains framework to make it handle
    system suspend/resume better (Ulf Hansson).
 
  - Make the runtime PM framework avoid resuming devices synchronously
    when user space changes the runtime PM settings for them and
    improve its error reporting (Rafael Wysocki, Linus Walleij).
 
  - Fix error paths in devfreq drivers (exynos, exynos-ppmu, exynos-bus)
    and in the core, make some devfreq code explicitly non-modular and
    change some of it into tristate (Bartlomiej Zolnierkiewicz,
    Peter Chen, Paul Gortmaker).
 
  - Add DT support to the generic PM clocks management code and make
    it export some more symbols (Jon Hunter, Paul Gortmaker).
 
  - Make the PCI PM core code slightly more robust against possible
    driver errors (Andy Shevchenko).
 
  - Make it possible to change DESTDIR and PREFIX in turbostat
    (Andy Shevchenko).
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Merge tag 'pm-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael  Wysocki:
 "Again, the majority of changes go into the cpufreq subsystem, but
  there are no big features this time.  The cpufreq changes that stand
  out somewhat are the governor interface rework and improvements
  related to the handling of frequency tables.  Apart from those, there
  are fixes and new device/CPU IDs in drivers, cleanups and an
  improvement of the new schedutil governor.

  Next, there are some changes in the hibernation core, including a fix
  for a nasty problem related to the MONITOR/MWAIT usage by CPU offline
  during resume from hibernation, a few core improvements related to
  memory management during resume, a couple of additional debug features
  and cleanups.

  Finally, we have some fixes and cleanups in the devfreq subsystem,
  generic power domains framework improvements related to system
  suspend/resume, support for some new chips in intel_idle and in the
  power capping RAPL driver, a new version of the AnalyzeSuspend utility
  and some assorted fixes and cleanups.

  Specifics:

   - Rework the cpufreq governor interface to make it more
     straightforward and modify the conservative governor to avoid using
     transition notifications (Rafael Wysocki).

   - Rework the handling of frequency tables by the cpufreq core to make
     it more efficient (Viresh Kumar).

   - Modify the schedutil governor to reduce the number of wakeups it
     causes to occur in cases when the CPU frequency doesn't need to be
     changed (Steve Muckle, Viresh Kumar).

   - Fix some minor issues and clean up code in the cpufreq core and
     governors (Rafael Wysocki, Viresh Kumar).

   - Add Intel Broxton support to the intel_pstate driver (Srinivas
     Pandruvada).

   - Fix problems related to the config TDP feature and to the validity
     of the MSR_HWP_INTERRUPT register in intel_pstate (Jan Kiszka,
     Srinivas Pandruvada).

   - Make intel_pstate update the cpu_frequency tracepoint even if the
     frequency doesn't change to avoid confusing powertop (Rafael
     Wysocki).

   - Clean up the usage of __init/__initdata in intel_pstate, mark some
     of its internal variables as __read_mostly and drop an unused
     structure element from it (Jisheng Zhang, Carsten Emde).

   - Clean up the usage of some duplicate MSR symbols in intel_pstate
     and turbostat (Srinivas Pandruvada).

   - Update/fix the powernv, s3c24xx and mvebu cpufreq drivers (Akshay
     Adiga, Viresh Kumar, Ben Dooks).

   - Fix a regression (introduced during the 4.5 cycle) in the
     pcc-cpufreq driver by reverting the problematic commit (Andreas
     Herrmann).

   - Add support for Intel Denverton to intel_idle, clean up Broxton
     support in it and make it explicitly non-modular (Jacob Pan, Jan
     Beulich, Paul Gortmaker).

   - Add support for Denverton and Ivy Bridge server to the Intel RAPL
     power capping driver and make it more careful about the handing of
     MSRs that may not be present (Jacob Pan, Xiaolong Wang).

   - Fix resume from hibernation on x86-64 by making the CPU offline
     during resume avoid using MONITOR/MWAIT in the "play dead" loop
     which may lead to an inadvertent "revival" of a "dead" CPU and a
     page fault leading to a kernel crash from it (Rafael Wysocki).

   - Make memory management during resume from hibernation more
     straightforward (Rafael Wysocki).

   - Add debug features that should help to detect problems related to
     hibernation and resume from it (Rafael Wysocki, Chen Yu).

   - Clean up hibernation core somewhat (Rafael Wysocki).

   - Prevent KASAN from instrumenting the hibernation core which leads
     to large numbers of false-positives from it (James Morse).

   - Prevent PM (hibernate and suspend) notifiers from being called
     during the cleanup phase if they have not been called during the
     corresponding preparation phase which is possible if one of the
     other notifiers returns an error at that time (Lianwei Wang).

   - Improve suspend-related debug printout in the tasks freezer and
     clean up suspend-related console handling (Roger Lu, Borislav
     Petkov).

   - Update the AnalyzeSuspend script in the kernel sources to version
     4.2 (Todd Brandt).

   - Modify the generic power domains framework to make it handle system
     suspend/resume better (Ulf Hansson).

   - Make the runtime PM framework avoid resuming devices synchronously
     when user space changes the runtime PM settings for them and
     improve its error reporting (Rafael Wysocki, Linus Walleij).

   - Fix error paths in devfreq drivers (exynos, exynos-ppmu,
     exynos-bus) and in the core, make some devfreq code explicitly
     non-modular and change some of it into tristate (Bartlomiej
     Zolnierkiewicz, Peter Chen, Paul Gortmaker).

   - Add DT support to the generic PM clocks management code and make it
     export some more symbols (Jon Hunter, Paul Gortmaker).

   - Make the PCI PM core code slightly more robust against possible
     driver errors (Andy Shevchenko).

   - Make it possible to change DESTDIR and PREFIX in turbostat (Andy
     Shevchenko)"

* tag 'pm-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (89 commits)
  Revert "cpufreq: pcc-cpufreq: update default value of cpuinfo_transition_latency"
  PM / hibernate: Introduce test_resume mode for hibernation
  cpufreq: export cpufreq_driver_resolve_freq()
  cpufreq: Disallow ->resolve_freq() for drivers providing ->target_index()
  PCI / PM: check all fields in pci_set_platform_pm()
  cpufreq: acpi-cpufreq: use cached frequency mapping when possible
  cpufreq: schedutil: map raw required frequency to driver frequency
  cpufreq: add cpufreq_driver_resolve_freq()
  cpufreq: intel_pstate: Check cpuid for MSR_HWP_INTERRUPT
  intel_pstate: Update cpu_frequency tracepoint every time
  cpufreq: intel_pstate: clean remnant struct element
  PM / tools: scripts: AnalyzeSuspend v4.2
  x86 / hibernate: Use hlt_play_dead() when resuming from hibernation
  cpufreq: powernv: Replacing pstate_id with frequency table index
  intel_pstate: Fix MSR_CONFIG_TDP_x addressing in core_get_max_pstate()
  PM / hibernate: Image data protection during restoration
  PM / hibernate: Add missing braces in __register_nosave_region()
  PM / hibernate: Clean up comments in snapshot.c
  PM / hibernate: Clean up function headers in snapshot.c
  PM / hibernate: Add missing braces in hibernate_setup()
  ...
2016-07-26 17:29:07 -07:00
Thomas Petazzoni
8c39d71036 PCI: aardvark: Add Aardvark PCI host controller driver
Add a driver for the Aardvark PCIe controller used on the Marvell Armada
3700 ARM64 SoC.

Based on work done by Hezi Shahmoon <hezi.shahmoon@marvell.com> and Marcin
Wojtas <mw@semihalf.com>.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-07-26 16:05:11 -05:00
Stephen Warren
f814430c3e PCI: tegra: Program PADS_REFCLK_CFG* registers with per-SoC values
The value that should be programmed into the PADS_REFCLK register varies
per SoC.  Fix the Tegra PCIe driver to program the correct values.  Future
SoCs will require different values in cfg0/1, so the two values are stored
separately in the per-SoC data structures.

For reference, the values are all documented in NV bug 1771116 comment 20.
The ASIC team has validated all these values, except for the Tegra20 value
which is simply left unchanged in this patch.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Thierry Reding <treding@nvidia.com>
2016-07-26 14:57:15 -05:00
Stephen Warren
cf5d318012 PCI: tegra: Program PADS_REFCLK_CFG* always, not just on legacy SoCs
tegra_pcie_phy_power_on() calls tegra_pcie_phy_enable() only for legacy
SoCs.  However, part of tegra_pcie_phy_enable() needs to happen in all
cases.  Move that code up one level into tegra_pcie_phy_power_on().

[bhelgaas: changelog]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-07-26 14:57:04 -05:00
Linus Torvalds
8e466955d6 Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 platform updates from Ingo Molnar:
 "The main changes in this cycle were:

   - Intel-SoC enhancements (Andy Shevchenko)

   - Intel CPU symbolic model definition rework (Dave Hansen)

   - ... other misc changes"

* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (25 commits)
  x86/sfi: Enable enumeration of SD devices
  x86/pci: Use MRFLD abbreviation for Merrifield
  x86/platform/intel-mid: Make vertical indentation consistent
  x86/platform/intel-mid: Mark regulators explicitly defined
  x86/platform/intel-mid: Rename mrfl.c to mrfld.c
  x86/platform/intel-mid: Enable spidev on Intel Edison boards
  x86/platform/intel-mid: Extend PWRMU to support Penwell
  x86/pci, x86/platform/intel_mid_pci: Remove duplicate power off code
  x86/platform/intel-mid: Add pinctrl for Intel Merrifield
  x86/platform/intel-mid: Enable GPIO expanders on Edison
  x86/platform/intel-mid: Add Power Management Unit driver
  x86/platform/atom/punit: Enable support for Merrifield
  x86/platform/intel_mid_pci: Rework IRQ0 workaround
  x86, thermal: Clean up and fix CPU model detection for intel_soc_dts_thermal
  x86, mmc: Use Intel family name macros for mmc driver
  x86/intel_telemetry: Use Intel family name macros for telemetry driver
  x86/acpi/lss: Use Intel family name macros for the acpi_lpss driver
  x86/cpufreq: Use Intel family name macros for the intel_pstate cpufreq driver
  x86/platform: Use new Intel model number macros
  x86/intel_idle: Use Intel family macros for intel_idle
  ...
2016-07-25 19:15:35 -07:00
Thierry Reding
08203f1fac PCI: tegra: Stop setting pcibios_min_mem
pcibios_min_mem only exists on 32-bit ARM, so using it in pci-tegra.c
prevents the driver from being used on other arches.

In __pci_assign_resource(), we clip the available area based on
PCIBIOS_MIN_MEM.  On 32-bit ARM, this is pcibios_min_mem, with a default
value of 0x01000000.  For Tegra, we discover the space available for PCI
resource allocation from the device tree, and the lowest address that will
ever be available is 0x12000000 (on Tegra124).

The Tegra windows are always higher than the default pcibios_min_mem, so
the __pci_assign_resource() has no effect, so there's no need to adjust
pcibios_min_mem here.

[bhelgaas: changelog]
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-07-25 16:24:11 -05:00
Thierry Reding
e6e9f471f5 PCI: tegra: Use generic pci_remap_iospace() rather than ARM32-specific one
Use the pci_remap_iospace() function provided by the PCI core, rather
than the 32-bit ARM-specific pci_ioremap_io().

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-07-25 16:03:24 -05:00
Thierry Reding
acb341e96f PCI: tegra: Use lower-case hex consistently for register definitions
Most of the register definitions use lowercase hexadecimal values, with a
few exceptions using uppercase.  Convert the latter to be more in line with
the former.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-07-25 16:02:05 -05:00
Keith Busch
e16b466059 PCI: Allow additional bus numbers for hotplug bridges
A user may hot add a switch requiring more than one bus to enumerate.  This
previously required a system reboot if BIOS did not sufficiently pad the
bus resource, which they frequently don't do.

Add a kernel parameter so a user can specify the minimum number of bus
numbers to reserve for a hotplug bridge's subordinate buses so rebooting
won't be necessary.

The default is 1, which is equivalent to previous behavior.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-07-25 12:52:47 -05:00
Keith Busch
a4959d8c1e PCI: Remove DPC tristate module option
Change the Downstream Port Containment config type from tristate to bool.

The driver doesn't automatically load based on any rules, so it needs to be
built-in in order to bind to devices it needs to drive.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-07-25 12:49:30 -05:00
Keith Busch
7e16fd6df1 PCI: Bind DPC to Root Ports as well as Downstream Ports
PCIe port type values are not flags, so OR'ing them is not correct.
Previously the result was equivalent to PCIe Downstream Ports, so we were
missing binding to DPC-capable Root Ports.

Change the type to 'any' so we can bind to both port types.  While this
will cause the code to check Upstream Ports, the driver won't claim them
since they are not DPC-capable.

Reported-by: Alexander Antonov <alexanderx.v.antonov@intel.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Mika Westerberg <mika.westerberg@linux.intel.com>
2016-07-25 12:45:19 -05:00
Cathy Avery
0c6e617f65 PCI: hv: Fix interrupt cleanup path
SR-IOV disabled from the host causes a memory leak.  pci-hyperv usually
first receives a PCI_EJECT notification and then proceeds to delete the
hpdev list entry in hv_eject_device_work().  Later in hv_msi_free() since
the device is no longer on the device list hpdev is NULL and hv_msi_free
returns without freeing int_desc as part of hv_int_desc_free().

Signed-off-by: Cathy Avery <cavery@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Jake Oshins <jakeo@microsoft.com>
2016-07-25 12:33:36 -05:00
Christophe JAILLET
991bfef82f PCI: dra7xx: Fix return value in case of error
In dra7xx_pcie_init_irq_domain(), the pattern used to check and return
error is:

   if (!var) {
      dev_err(...);
      return PTR_ERR(var);
   }

So the returned value in case of error is always 0, which means 'success'.
Change it to return -ENODEV instead.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Kishon Vijay Abraham I <kishon@ti.com>
2016-07-25 12:29:51 -05:00
Christophe JAILLET
cec6dba24b PCI: xilinx: Fix return value in case of error
In xilinx_pcie_init_irq_domain(), the pattern used to check and return
error is:

   if (!var) {
      dev_err(...);
      return PTR_ERR(var);
   }

So the returned value in case of error is always 0, which means 'success'.
Change it to return -ENODEV instead.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
2016-07-25 12:28:12 -05:00
Ley Foon Tan
3a928e98a8 PCI: altera: Poll for link up status after retraining the link
Some PCIe devices take a long time to reach link up state after retrain.
Poll for link up status after retraining the link.  This is to make sure
the link is up before we access configuration space.

[bhelgaas: changelog]
Signed-off-by: Ley Foon Tan <lftan@altera.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-07-22 16:02:57 -05:00
Ley Foon Tan
c622032ebc PCI: altera: Check link status before retrain link
Check the link status before retraining.  If the link is not up, don't
bother trying to retrain it.

[bhelgaas: split code move to separate patch, changelog]
Signed-off-by: Ley Foon Tan <lftan@altera.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-07-22 15:58:02 -05:00
Bjorn Helgaas
f8be11ae3d PCI: altera: Reorder read/write functions
Move cra_writel(), cra_readl(), and altera_pcie_link_is_up() so a future
patch can use them in altera_pcie_retrain().  No functional change
intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-07-22 15:54:41 -05:00
Christoph Hellwig
4ef33685aa PCI: Spread interrupt vectors in pci_alloc_irq_vectors()
Set the affinity_mask in the PCI device before allocating vectors so that
the affinity can be propagated through the MSI descriptor structures to the
core IRQ code.  To facilitate this, new __pci_enable_msi_range() and
__pci_enable_msix_range() helpers are factored out of their not prefixed
variants which assigning the new IRQ affinity mask in the PCI device so
that the low-level interrupt code can perform the interrupt affinity
assignment and do node-local allocations.

A new PCI_IRQ_NOAFFINITY flag is added to pci_alloc_irq_vectors() so that
this function can also be used by drivers that don't wish to use the
automatic affinity assignment.

[bhelgaas: omit "else" after "return" consistently]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alexander Gordeev <agordeev@redhat.com>
2016-07-21 15:57:03 -05:00
Andy Shevchenko
6ec39cf5cd PCI / PM: check all fields in pci_set_platform_pm()
When assign new PCI platform PM operations check for all mandatory fields to
prevent NULL pointer dereference.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-07-21 22:55:53 +02:00
Christoph Hellwig
aff171641d PCI: Provide sensible IRQ vector alloc/free routines
Add a function to allocate and free a range of interrupt vectors, using
MSI-X, MSI or legacy vectors (in that order) based on the capabilities of
the underlying device and PCIe complex.

Additionally a new helper is provided to get the Linux IRQ number for given
device-relative vector so that the drivers don't need to allocate their own
arrays to keep track of the vectors for the multi vector MSI-X case.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alexander Gordeev <agordeev@redhat.com>
2016-07-21 15:50:07 -05:00
Christoph Hellwig
3ac020e0ca PCI: Make the "entries" argument to pci_enable_msix() optional
The "entries" argument isn't needed if the list of entries does not contain
any holes.  Make it optional so that we can avoid the need to allocate a
msix_entry structure for this (common) case.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alexander Gordeev <agordeev@redhat.com>
2016-07-21 15:49:43 -05:00
Christoph Hellwig
12eb21de1f PCI: Switch msix_program_entries() to use pci_msix_desc_addr()
Instead of relying on the msix_entry structure for the vector number, read
it from the msi_desc.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alexander Gordeev <agordeev@redhat.com>
2016-07-21 15:49:33 -05:00
Christoph Hellwig
5eb6d66019 PCI: Add pci_msix_desc_addr() helper
Add a pci_msix_desc_addr() helper to factor out the calculation of the base
address for a given MSI-X vector.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alexander Gordeev <agordeev@redhat.com>
2016-07-21 15:04:24 -05:00
Tyrel Datwyler
e2413a7dae PCI: rpaphp: Fix slot registration for multiple slots under a PHB
The underlying slot hotplug registration code assumed multiple slots, but
the actual implementation is broken for multiple slots.

This went unnoticed for years do to the fact that PowerVM seems to only
ever provide a single hotplug slot per PHB.

Under qemu/kvm the hotplug slot model aligns more with x86 where
multiple slots are presented under a single PHB. As seen in the
following each additional slot after the first fails to register due to
each slot always being compared against the first child node of the PHB
in the device tree.

  rpaphp: RPA HOT Plug PCI Controller Driver version: 0.1
  rpaphp: Slot [Slot 0] registered
  rpaphp: pci_hp_register failed with error -16
  rpaphp: pci_hp_register failed with error -16
  rpaphp: pci_hp_register failed with error -16
  rpaphp: pci_hp_register failed with error -16

The registration logic is fixed so that each slot is compared
against the existing child devices of the PHB in the device tree to
determine present slots vs empty slots.

  rpaphp: RPA HOT Plug PCI Controller Driver version: 0.1
  rpaphp: Slot [C0] registered
  rpaphp: Slot [C1] registered
  rpaphp: Slot [C2] registered
  rpaphp: Slot [C3] registered
  rpaphp: Slot [C4] registered

Signed-off-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
[mpe: Massage changelog]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-20 11:54:55 +10:00
Alex Williamson
db83f87b73 PCI: Add DMA alias quirk for Adaptec 3805
Add a DMA alias quirk for the Adaptec 3805, just like the 3405 quirk added
in commit d3d2ab43dd ("PCI: Add DMA alias quirk for Adaptec 3405").

Link: https://www.redhat.com/archives/vfio-users/2016-July/msg00046.html
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-07-19 17:13:32 -05:00
Ben Dooks
2a2aca316a PCI: Include <asm/dma.h> for isa_dma_bridge_buggy
At least on arm, <asm/dma.h> does not get included when building
drivers/pci/pci.o.  This causes the following build warning which can be
fixed by including <asm/dma.h>:

  drivers/pci/pci.c:37:5: warning: symbol 'isa_dma_bridge_buggy' was not declared. Should it be static?

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-07-19 17:03:59 -05:00
Andrew Donnellan
5473a6bf63 PCI/hotplug: pnv_php: handle OPAL_PCI_SLOT_OFFLINE power state
When calling pnv_php_set_slot_power_state() with state ==
OPAL_PCI_SLOT_OFFLINE, remove devices from the device tree as if we're
dealing with OPAL_PCI_SLOT_POWER_OFF.

Cc: Gavin Shan <gwshan@linux.vnet.ibm.com>
Cc: linux-pci@vger.kernel.org
Cc: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Acked-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-14 20:28:10 +10:00
Andrew Donnellan
89379f165a PCI/hotplug: pnv_php: export symbols and move struct types needed by cxl
The cxl driver will use infrastructure from pnv_php to handle device tree
updates when switching bi-modal CAPI cards into CAPI mode.

To enable this, export pnv_php_find_slot() and
pnv_php_set_slot_power_state(), and add corresponding declarations, as well
as the definition of struct pnv_php_slot, to asm/pnv-pci.h.

Cc: Gavin Shan <gwshan@linux.vnet.ibm.com>
Cc: linux-pci@vger.kernel.org
Cc: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Acked-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-07-14 20:28:08 +10:00
Bjorn Helgaas
da6163ad3a PCI: versatile: Simplify host bridge window iteration
The switch is the only statement in the resource_list_for_each_entry()
loop, so remove unnecessary "continue" statements in the switch.  Simplify
checking for the required non-prefetchable memory aperture.

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-06-25 07:44:24 -05:00
Bjorn Helgaas
2fbb353041 PCI: versatile: Request host bridge window resources with core function
Use devm_request_pci_bus_resources() to request host bridge window
resources instead of doing it by hand in the driver.

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-06-25 07:44:24 -05:00
Bjorn Helgaas
45c64b6ac4 PCI: tegra: Request host bridge window resources with core function
Use devm_request_pci_bus_resources() to request host bridge window
resources instead of doing it by hand in the driver.

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-06-25 07:44:24 -05:00
Bjorn Helgaas
c4102c92df PCI: tegra: Remove top-level resource from hierarchy
41534e5378 ("PCI: tegra: Implement a proper resource hierarchy") did two
things:

  1) It added a top-level resource that encloses all resources declared in
     the DT description, including registers and bridge apertures, and

  2) It requested the bridge apertures, which means the PCI core can track
     the resources used by PCI devices below the bridge.

The latter is necessary, but the former is questionable because there's no
guarantee that the bridge registers and the apertures are contiguous.  In
this example:

  # cat /proc/iomem
  00000000-3fffffff : /pcie-controller@00003000
    00000000-00000fff : /pcie-controller@00003000/pci@1,0
    00003000-000037ff : pads
    00003800-000039ff : afi
    10000000-1fffffff : cs

the resource tree claims that [mem 0x00003a00-0x0fffffff] is consumed by
/pcie-controller@00003000, but it's not mentioned in the DT, and it might
actually be used by other devices.

Remove the top-level resource so we don't claim more than the device
actually consumes.

This reintroduces the problem that we can't match the resources, e.g.,
"pads", "afi", "cs", etc., to the DT device.  I think this should be solved
by having the DT core request all resources of all devices in the DT (it
does not do that today).  If a driver claims the device, it can request the
resources it uses.  For example:

  # cat /proc/iomem
  00000000-00000fff : /pcie-controller@00003000
    00000000-00000fff : /pcie-controller@00003000/pci@1,0
  00003000-000037ff : /pcie-controller@00003000
    00003000-000037ff : pads
  00003800-000039ff : /pcie-controller@00003000
    00003800-000039ff : afi
  10000000-1fffffff : /pcie-controller@00003000
    10000000-1fffffff : cs
  ...

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-06-25 07:44:23 -05:00
Bjorn Helgaas
4c540a35c0 PCI: rcar: Simplify host bridge window iteration
The switch is the only statement in the resource_list_for_each_entry()
loop, so remove unnecessary cases and "continue" statements in the switch.
Inline rcar_pcie_release_of_pci_ranges(), which is only called once.

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-06-25 07:44:23 -05:00
Bjorn Helgaas
6fd7f55097 PCI: rcar: Request host bridge window resources with core function
Use devm_request_pci_bus_resources() to request host bridge window
resources instead of doing it by hand in the driver.

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-06-25 07:44:23 -05:00
Bjorn Helgaas
ac575ead87 PCI: rcar Gen2: Request host bridge window resources
Request host bridge window resources so they appear in ioport_resource and
iomem_resource and are reflected in /proc/ioports and /proc/iomem.

Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-06-25 07:44:23 -05:00
Bjorn Helgaas
b2a5d3e2cf PCI: rcar: Drop gen2 dummy I/O port region
Previously we added a dummy I/O port region even though the R-Car
controller doesn't support PCI port I/O.  This resulted in bogus root bus
resources like this:

  pci_bus 0000:00: root bus resource [io  0xee080000-0xee0810ff]
  pci_bus 0000:00: root bus resource [mem 0xee080000-0xee0810ff]

Drop the unused dummy I/O port region and set struct hw_pci.io_optional so
the ARM PCI code doesn't add a default one for us.

Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-06-25 07:44:23 -05:00
Lorenzo Pieralisi
dcce0f153b PCI: generic: Claim bus resources on PCI_PROBE_ONLY set-ups
We claim PCI BAR and bridge window resources in pci_bus_assign_resources(),
but when PCI_PROBE_ONLY is set, we treat those resources as immutable and
don't call pci_bus_assign_resources(), so the resources aren't put in the
resource tree.

When the resources aren't in the tree, they don't show up in /proc/iomem,
we can't detect conflicts, and we need special cases elsewhere for
PCI_PROBE_ONLY or resources without a parent pointer.

Claim all PCI BAR and window resources in the PCI_PROBE_ONLY case.

If a PCI_PROBE_ONLY platform assigns conflicting resources, Linux can't fix
the conflicts.  Previously we didn't notice the conflicts, but now we will,
which may expose new failures.

[bhelgaas: changelog, summarize comment]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Will Deacon <will.deacon@arm.com>
CC: Arnd Bergmann <arnd@arndb.de>
CC: David Daney <david.daney@cavium.com>
2016-06-23 11:48:59 -05:00
Lorenzo Pieralisi
765bf9b739 PCI: Add generic pci_bus_claim_resources()
All PCI resources (bridge windows and BARs) should be inserted in the
iomem_resource and ioport_resource trees so we know what space is occupied
and what is available for other devices.  There's nothing arch-specific
about this, but it is currently done by arch-specific code.

Add a generic pci_bus_claim_resources() interface so we can migrate away
from the arch-specific code.

[bhelgaas: changelog]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Arnd Bergmann <arnd@arndb.de>
CC: Yinghai Lu <yinghai@kernel.org>
2016-06-23 11:48:59 -05:00
Koehrer Mathias (ETAS/ESW5)
644a544fd9 PCI: Extending pci=resource_alignment to specify device/vendor IDs
Some uio-based PCI drivers, e.g., uio_cif do not work if the assigned PCI
memory resources are not page aligned.

By using the kernel option "pci=resource_alignment" it is possible to force
single PCI boards to use page alignment for their memory resources.
However, this is fairly cumbersome if several of these boards are in use
as the specification of the cards has to be done via PCI bus/slot/function
number which might change, e.g., by adding another board.

Extend the kernel option "pci=resource_alignment" to allow specification of
relevant devices via PCI device/vendor (and subdevice/subvendor) IDs.  The
specification of the devices via device/vendor is indicated by a leading
string "pci:" as argument to "pci=resource_alignment".  The format of the
specification is pci:<vendor>:<device>[:<subvendor>:<subdevice>]

Signed-off-by: Mathias Koehrer <mathias.koehrer@etas.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-06-21 17:00:34 -05:00
Mika Westerberg
14a16d57ea PCI: Fix whitespace in struct dpc_dev
Remove unnecessary spaces before tabs.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Keith Busch <keith.busch@intel.com>
2016-06-21 13:49:57 -05:00
Mika Westerberg
733f3d1339 PCI: Convert Downstream Port Containment driver to use devm_* functions
Use the device resource management (devm) interfaces so we don't need to
explicitly release resources on failure paths or when the driver is
removed.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Keith Busch <keith.busch@intel.com>
2016-06-21 12:30:42 -05:00
Bjorn Helgaas
6df68f22df PCI: mvebu: Request host bridge window resources with core function
Use devm_request_pci_bus_resources() to request host bridge window
resources instead of doing it by hand in the driver.

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-06-21 10:13:30 -05:00
Bjorn Helgaas
5aa182a26c PCI: generic: Simplify host bridge window iteration
The switch is the only statement in the resource_list_for_each_entry()
loop, so remove unnecessary "continue" statements in the switch.  Remove
unnecessary "goto" statements and label.  Simplify checking for the
required non-prefetchable memory aperture.

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-06-21 10:10:37 -05:00
Bjorn Helgaas
b7f957ac27 PCI: generic: Request host bridge window resources with core function
Use devm_request_pci_bus_resources() to request host bridge window
resources instead of doing it by hand in the driver.

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-06-21 10:09:37 -05:00
Gavin Shan
66725152fb PCI/hotplug: PowerPC PowerNV PCI hotplug driver
This adds standalone driver to support PCI hotplug for PowerPC PowerNV
platform that runs on top of skiboot firmware. The firmware identifies
hotpluggable slots and marked their device tree node with proper
"ibm,slot-pluggable" and "ibm,reset-by-firmware". The driver scans
device tree nodes to create/register PCI hotplug slot accordingly.

The PCI slots are organized in fashion of tree, which means one
PCI slot might have parent PCI slot and parent PCI slot possibly
contains multiple child PCI slots. At the plugging time, the parent
PCI slot is populated before its children. The child PCI slots are
removed before their parent PCI slot can be removed from the system.

If the skiboot firmware doesn't support slot status retrieval, the PCI
slot device node shouldn't have property "ibm,reset-by-firmware". In
that case, none of valid PCI slots will be detected from device tree.
The skiboot firmware doesn't export the capability to access attention
LEDs yet and it's something for TBD.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-06-21 15:30:58 +10:00
Gavin Shan
d366d28cd1 PCI: Add pcibios_setup_bridge()
Currently, PowerPC PowerNV platform utilizes ppc_md.pcibios_fixup(),
which is called for once after PCI probing and resource assignment
are completed, to allocate platform required resources for PCI devices:
PE#, IO and MMIO mapping, DMA address translation (TCE) table etc.
Obviously, it's not hotplug friendly.

This adds weak function pcibios_setup_bridge(), which is called by
pci_setup_bridge(). PowerPC PowerNV platform will reuse the function
to assign above platform required resources to newly plugged PCI devices
during PCI hotplug in subsequent patches.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-06-21 15:30:51 +10:00
Bjorn Helgaas
ba4f6d9201 PCI: altera: Simplify host bridge window iteration
The switch is the only statement in the resource_list_for_each_entry()
loop, so remove unnecessary "continue" statements in the switch.  Simplify
checking for the required non-prefetchable memory aperture.  Inline
altera_pcie_release_of_pci_ranges(), which is only called once.

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-06-20 14:06:06 -05:00
Bjorn Helgaas
74462284bd PCI: altera: Request host bridge window resources with core function
Use devm_request_pci_bus_resources() to request host bridge window
resources instead of doing it by hand in the driver.

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-06-20 14:06:06 -05:00
Bjorn Helgaas
9061f9bea4 PCI: xilinx-nwl: Use dev_printk() when possible
Use dev_printk() when possible to make messages more useful.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-06-20 14:06:06 -05:00
Bjorn Helgaas
21f7fc241e PCI: xilinx-nwl: Request host bridge window resources
Request host bridge window resources so they appear in ioport_resource and
iomem_resource and are reflected in /proc/ioports and /proc/iomem.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-06-20 14:06:06 -05:00
Bjorn Helgaas
0bb0130755 PCI: xilinx-nwl: Free bridge resource list on failure
of_pci_get_host_bridge_resources() allocates a list of resources for host
bridge windows.  If we fail after allocating that list, free it before we
return error.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2016-06-20 14:06:06 -05:00